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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredRentReceivablesNet" xlink:to="us-gaap_DeferredRentReceivablesNet_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredRentReceivablesNet_lbl" xml:lang="en-US">Unbilled rents receivable, net</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherAssets" xlink:label="us-gaap_OtherAssets" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherAssets" xlink:to="us-gaap_OtherAssets_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherAssets_lbl" xml:lang="en-US">Deferred charges and other assets, net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherAssets_lbl" xml:lang="en-US">Other assets</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_OtherAssets_lbl" xml:lang="en-US">Total deferred charges and other assets, net</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalents" xlink:label="us-gaap_RestrictedCashAndCashEquivalents" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestrictedCashAndCashEquivalents" xlink:to="us-gaap_RestrictedCashAndCashEquivalents_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RestrictedCashAndCashEquivalents_lbl" xml:lang="en-US">Restricted Cash And Cash Equivalents</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_RestrictedCashAndCashEquivalents_lbl" xml:lang="en-US">Total restricted cash</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_RestrictedCashAndCashEquivalents_lbl" xml:lang="en-US">Restricted cash</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccountsReceivableNet" xlink:label="us-gaap_AccountsReceivableNet" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountsReceivableNet" xlink:to="us-gaap_AccountsReceivableNet_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AccountsReceivableNet_lbl" xml:lang="en-US">Accounts Receivable Net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AccountsReceivableNet_lbl" xml:lang="en-US">Accounts receivable, net of allowance for doubtful accounts of $2,790 and $2,036</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_AccountsReceivableNet_lbl" xml:lang="en-US">Accounts receivable, net of allowance for doubtful accounts of $2,905 and $2,319</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_AccountsReceivableNet_lbl" xml:lang="en-US">Accounts receivable, net of allowance for doubtful accounts of $2,697 and $2790</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_Assets" xlink:label="us-gaap_Assets" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Assets" xlink:to="us-gaap_Assets_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_Assets_lbl" xml:lang="en-US">Total assets</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_Assets_lbl" xml:lang="en-US">Total assets</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:to="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl" xml:lang="en-US">LIABILITIES AND EQUITY</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UnsecuredDebt" xlink:label="us-gaap_UnsecuredDebt" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UnsecuredDebt" xlink:to="us-gaap_UnsecuredDebt_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_UnsecuredDebt_lbl" xml:lang="en-US">Unsecured Debt</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_UnsecuredDebt_lbl" xml:lang="en-US">Senior Unsecured Notes</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_UnsecuredDebt_lbl" xml:lang="en-US">Unsecured Debt, Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_UnsecuredDebt_lbl" xml:lang="en-US">Senior unsecured notes</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LineOfCredit" xlink:label="us-gaap_LineOfCredit" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCredit" xlink:to="us-gaap_LineOfCredit_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LineOfCredit_lbl" xml:lang="en-US">Revolving credit facility</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_LineOfCredit_lbl" xml:lang="en-US">Long-term Line of Credit, Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_LineOfCredit_lbl" xml:lang="en-US">Outstanding borrowings under the facility</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SecuredDebt" xlink:label="us-gaap_SecuredDebt" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SecuredDebt" xlink:to="us-gaap_SecuredDebt_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SecuredDebt_lbl" xml:lang="en-US">Secured Debt</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SecuredDebt_lbl" xml:lang="en-US">Mortgages, loans payable and other obligations</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_SecuredDebt_lbl" xml:lang="en-US">Secured Debt, Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_SecuredDebt_lbl" xml:lang="en-US">Mortgage loan</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DividendsPayableCurrentAndNoncurrent" xlink:label="us-gaap_DividendsPayableCurrentAndNoncurrent" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendsPayableCurrentAndNoncurrent" xlink:to="us-gaap_DividendsPayableCurrentAndNoncurrent_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DividendsPayableCurrentAndNoncurrent_lbl" xml:lang="en-US">Dividends and distributions payable</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent" xlink:label="us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent" xlink:to="us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent_lbl" xml:lang="en-US">Accounts payable, accrued expenses and other liabilities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent_lbl" xml:lang="en-US">Accounts Payable and Accrued Liabilities, Total</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_RentsReceivedInAdvanceAndSecurityDeposits" xlink:label="cli_RentsReceivedInAdvanceAndSecurityDeposits" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_RentsReceivedInAdvanceAndSecurityDeposits" xlink:to="cli_RentsReceivedInAdvanceAndSecurityDeposits_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_RentsReceivedInAdvanceAndSecurityDeposits_lbl" xml:lang="en-US">Amount at the balance sheet date including both: (a) rents and other amounts paid in advance by tenants and clients; and (b) security deposits paid in advance to protect the provider of a service, such as a lessor, against damage or nonpayment by the tenant (lessee) during the term of the agreement.  Such damages may include physical damage to the property, theft of property, and other contractual breaches.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_RentsReceivedInAdvanceAndSecurityDeposits_lbl" xml:lang="en-US">Rents received in advance and security deposits</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InterestPayableCurrentAndNoncurrent" xlink:label="us-gaap_InterestPayableCurrentAndNoncurrent" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestPayableCurrentAndNoncurrent" xlink:to="us-gaap_InterestPayableCurrentAndNoncurrent_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InterestPayableCurrentAndNoncurrent_lbl" xml:lang="en-US">Accrued interest payable</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_InterestPayableCurrentAndNoncurrent_lbl" xml:lang="en-US">Accrued interest payable</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_Liabilities" xlink:label="us-gaap_Liabilities" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Liabilities" xlink:to="us-gaap_Liabilities_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_Liabilities_lbl" xml:lang="en-US">Total liabilities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_Liabilities_lbl" xml:lang="en-US">Total liabilities and partners'/members' capital (deficit)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_Liabilities_lbl" xml:lang="en-US">Total liabilities</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CommitmentsAndContingencies" xlink:label="us-gaap_CommitmentsAndContingencies" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommitmentsAndContingencies" xlink:to="us-gaap_CommitmentsAndContingencies_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommitmentsAndContingencies_lbl" xml:lang="en-US">Commitments And Contingencies 2009</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CommitmentsAndContingencies_lbl" xml:lang="en-US">Commitments and contingencies</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract" xlink:to="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_lbl" xml:lang="en-US">Equity:</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PreferredStockValue" xlink:label="us-gaap_PreferredStockValue" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockValue" xlink:to="us-gaap_PreferredStockValue_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockValue_lbl" xml:lang="en-US">Preferred stock, $0.01 par value, 5,000,000 shares authorized, 0 and 10,000 shares outstanding, at liquidation preference</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_PreferredStockValue_lbl" xml:lang="en-US">Preferred Stock, Value, Issued, Ending Balance</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_PreferredStockValue_lbl" xml:lang="en-US">Preferred Stock, Value, Issued, Beginning Balance</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PreferredStockValue_lbl" xml:lang="en-US">Preferred stock issued</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_PreferredStockValue_lbl" xml:lang="en-US">Preferred Stock, Value, Issued, Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_PreferredStockValue_lbl" xml:lang="en-US">Series C preferred stock redemption value</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CommonStockValue" xlink:label="us-gaap_CommonStockValue" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockValue" xlink:to="us-gaap_CommonStockValue_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockValue_lbl" xml:lang="en-US">Common stock value</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_CommonStockValue_lbl" xml:lang="en-US">Common stock, $0.01 par value, 190,000,000 shares authorized, 79,398,646 and 78,969,752 shares outstanding</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_CommonStockValue_lbl" xml:lang="en-US">Common stock, $0.01 par value, 190,000,000 shares authorized, 79,398,646 and 78,969,752 shares outstanding</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CommonStockValue_lbl" xml:lang="en-US">Common stock, $0.01 par value, 190,000,000 shares authorized, 79,398,646 and 78,969,752 shares outstanding</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_CommonStockValue_lbl" xml:lang="en-US">Common stock, $0.01 par value, 190,000,000 shares authorized, 79,398,646 and 78,969,752 shares outstanding</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_CommonStockValue_lbl" xml:lang="en-US">Common stock, $0.01 par value, 190,000,000 shares authorized, 87,799,479 and 79,605,474 shares outstanding</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AdditionalPaidInCapital" xlink:label="us-gaap_AdditionalPaidInCapital" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdditionalPaidInCapital" xlink:to="us-gaap_AdditionalPaidInCapital_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AdditionalPaidInCapital_lbl" xml:lang="en-US">Additional Paid In Capital</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_AdditionalPaidInCapital_lbl" xml:lang="en-US">Additional Paid in Capital, Ending Balance</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_AdditionalPaidInCapital_lbl" xml:lang="en-US">Additional Paid in Capital, Beginning Balance</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AdditionalPaidInCapital_lbl" xml:lang="en-US">Additional paid-in capital</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_AdditionalPaidInCapital_lbl" xml:lang="en-US">Additional Paid in Capital, Total</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RetainedEarningsAccumulatedDeficit" xlink:to="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xml:lang="en-US">Retained Earnings Accumulated Deficit</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xml:lang="en-US">Retained Earnings (Accumulated Deficit), Ending Balance</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xml:lang="en-US">Retained Earnings (Accumulated Deficit), Beginning Balance</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xml:lang="en-US">Dividends in excess of net earnings</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xml:lang="en-US">Dividends in excess of net earnings</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="us-gaap_StockholdersEquity" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquity" xlink:to="us-gaap_StockholdersEquity_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockholdersEquity_lbl" xml:lang="en-US">Stockholders' Equity Attributable to Parent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_StockholdersEquity_lbl" xml:lang="en-US">Stockholders' Equity Attributable to Parent, Ending Balance</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_StockholdersEquity_lbl" xml:lang="en-US">Stockholders' Equity Attributable to Parent, Beginning Balance</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_StockholdersEquity_lbl" xml:lang="en-US">Total Mack-Cali Realty Corporation stockholders' equity</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NoncontrollingInterestItemsAbstract" xlink:label="us-gaap_NoncontrollingInterestItemsAbstract" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NoncontrollingInterestItemsAbstract" xlink:to="us-gaap_NoncontrollingInterestItemsAbstract_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NoncontrollingInterestItemsAbstract_lbl" xml:lang="en-US">Noncontrolling Interest Items [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_NoncontrollingInterestItemsAbstract_lbl" xml:lang="en-US">Noncontrolling interests in subsidiaries:</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MinorityInterestInOperatingPartnerships" xlink:label="us-gaap_MinorityInterestInOperatingPartnerships" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MinorityInterestInOperatingPartnerships" xlink:to="us-gaap_MinorityInterestInOperatingPartnerships_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MinorityInterestInOperatingPartnerships_lbl" xml:lang="en-US">Operating Partnership</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_MinorityInterestInOperatingPartnerships_lbl" xml:lang="en-US">Preferred unit in operating partnership</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_MinorityInterestInOperatingPartnerships_lbl" xml:lang="en-US">Operating patnership acquired</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MinorityInterestInJointVentures" xlink:label="us-gaap_MinorityInterestInJointVentures" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MinorityInterestInJointVentures" xlink:to="us-gaap_MinorityInterestInJointVentures_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MinorityInterestInJointVentures_lbl" xml:lang="en-US">Minority Interest In Joint Ventures</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_MinorityInterestInJointVentures_lbl" xml:lang="en-US">Consolidated joint ventures</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_MinorityInterestInJointVentures_lbl" xml:lang="en-US">Consolidated joint ventures</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_MinorityInterestInJointVentures_lbl" xml:lang="en-US">Noncontrolling interests in consolidated joint ventures</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MinorityInterest" xlink:label="us-gaap_MinorityInterest" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MinorityInterest" xlink:to="us-gaap_MinorityInterest_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MinorityInterest_lbl" xml:lang="en-US">Total noncontrolling interests in subsidiaries</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_MinorityInterest_lbl" xml:lang="en-US">Balance at September 30, 2010</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_MinorityInterest_lbl" xml:lang="en-US">Balance at January 1, 2010</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_MinorityInterest_lbl" xml:lang="en-US">Total noncontrolling interests in subsidiaries</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:to="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_lbl" xml:lang="en-US">Total equity</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_lbl" xml:lang="en-US">Balance, value</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_lbl" xml:lang="en-US">Balance, value</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_lbl" xml:lang="en-US">Total equity</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesAndStockholdersEquity" xlink:to="us-gaap_LiabilitiesAndStockholdersEquity_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xml:lang="en-US">Liabilities And Stockholders Equity</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xml:lang="en-US">Total liabilities and equity</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xml:lang="en-US">Total liabilities and equity</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivable" xlink:label="us-gaap_AllowanceForDoubtfulAccountsReceivable" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AllowanceForDoubtfulAccountsReceivable" xlink:to="us-gaap_AllowanceForDoubtfulAccountsReceivable_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AllowanceForDoubtfulAccountsReceivable_lbl" xml:lang="en-US">Allowance for doubtful accounts receivable</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_AllowanceForDoubtfulAccountsReceivable_lbl" xml:lang="en-US">Allowance for doubtful accounts</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PreferredStockParOrStatedValuePerShare" xlink:label="us-gaap_PreferredStockParOrStatedValuePerShare" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockParOrStatedValuePerShare" xlink:to="us-gaap_PreferredStockParOrStatedValuePerShare_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockParOrStatedValuePerShare_lbl" xml:lang="en-US">Preferred stock, par or stated value per share</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PreferredStockParOrStatedValuePerShare_lbl" xml:lang="en-US">Preferred stock, par value per share</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PreferredStockSharesAuthorized" xlink:label="us-gaap_PreferredStockSharesAuthorized" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockSharesAuthorized" xlink:to="us-gaap_PreferredStockSharesAuthorized_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockSharesAuthorized_lbl" xml:lang="en-US">Preferred stock, shares authorized</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PreferredStockSharesOutstanding" xlink:label="us-gaap_PreferredStockSharesOutstanding" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockSharesOutstanding" xlink:to="us-gaap_PreferredStockSharesOutstanding_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockSharesOutstanding_lbl" xml:lang="en-US">Preferred stock, shares outstanding</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_PreferredStockSharesOutstanding_lbl" xml:lang="en-US">Preferred Stock, Shares Outstanding, Ending Balance</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_PreferredStockSharesOutstanding_lbl" xml:lang="en-US">Preferred Stock, Shares Outstanding, Beginning Balance</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PreferredStockSharesOutstanding_lbl" xml:lang="en-US">Preferred stock, shares outstanding at liquidation preference</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_PreferredStockSharesOutstanding_lbl" xml:lang="en-US">Preferred shares</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CommonStockParOrStatedValuePerShare" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockParOrStatedValuePerShare" xlink:to="us-gaap_CommonStockParOrStatedValuePerShare_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare_lbl" xml:lang="en-US">Common stock, par value per share</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CommonStockSharesAuthorized" xlink:label="us-gaap_CommonStockSharesAuthorized" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesAuthorized" xlink:to="us-gaap_CommonStockSharesAuthorized_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl" xml:lang="en-US">Common stock, shares authorized</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CommonStockSharesOutstanding" xlink:label="us-gaap_CommonStockSharesOutstanding" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesOutstanding" xlink:to="us-gaap_CommonStockSharesOutstanding_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xml:lang="en-US">Common Stock Shares Outstanding</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xml:lang="en-US">Common Stock, Shares, Outstanding, Ending Balance</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xml:lang="en-US">Common Stock, Shares, Outstanding, Beginning Balance</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xml:lang="en-US">Common stock, shares outstanding</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xml:lang="en-US">Common shares / units</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeStatementAbstract" xlink:label="us-gaap_IncomeStatementAbstract" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeStatementAbstract" xlink:to="us-gaap_IncomeStatementAbstract_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeStatementAbstract_lbl" xml:lang="en-US">Consolidated Statements Of Operations [Abstract]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RevenuesAbstract" xlink:label="us-gaap_RevenuesAbstract" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RevenuesAbstract" xlink:to="us-gaap_RevenuesAbstract_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RevenuesAbstract_lbl" xml:lang="en-US">REVENUES</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OperatingLeasesIncomeStatementLeaseRevenue" xlink:label="us-gaap_OperatingLeasesIncomeStatementLeaseRevenue" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesIncomeStatementLeaseRevenue" xlink:to="us-gaap_OperatingLeasesIncomeStatementLeaseRevenue_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLeasesIncomeStatementLeaseRevenue_lbl" xml:lang="en-US">Base rents</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OperatingLeasesIncomeStatementLeaseRevenue_lbl" xml:lang="en-US">Lease revenue</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_OperatingLeasesIncomeStatementLeaseRevenue_lbl" xml:lang="en-US">Operating Leases, Income Statement, Lease Revenue, Total</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_TenantReimbursements" xlink:label="us-gaap_TenantReimbursements" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TenantReimbursements" xlink:to="us-gaap_TenantReimbursements_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_TenantReimbursements_lbl" xml:lang="en-US">Escalations and recoveries from tenants</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GeneralContractorRevenue" xlink:label="us-gaap_GeneralContractorRevenue" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GeneralContractorRevenue" xlink:to="us-gaap_GeneralContractorRevenue_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_GeneralContractorRevenue_lbl" xml:lang="en-US">Construction services</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherRealEstateRevenue" xlink:label="us-gaap_OtherRealEstateRevenue" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherRealEstateRevenue" xlink:to="us-gaap_OtherRealEstateRevenue_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherRealEstateRevenue_lbl" xml:lang="en-US">Other Real Estate Revenue</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherRealEstateRevenue_lbl" xml:lang="en-US">Real estate services</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OtherOperatingIncome" xlink:label="us-gaap_OtherOperatingIncome" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherOperatingIncome" xlink:to="us-gaap_OtherOperatingIncome_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OtherOperatingIncome_lbl" xml:lang="en-US">Other income</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_OtherOperatingIncome_lbl" xml:lang="en-US">Operating and other</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OtherOperatingIncome_lbl" xml:lang="en-US">Operating and other</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_OtherOperatingIncome_lbl" xml:lang="en-US">Other income</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RealEstateRevenueNet" xlink:label="us-gaap_RealEstateRevenueNet" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RealEstateRevenueNet" xlink:to="us-gaap_RealEstateRevenueNet_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RealEstateRevenueNet_lbl" xml:lang="en-US">Real Estate Revenue, Net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RealEstateRevenueNet_lbl" xml:lang="en-US">Total revenues</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_RealEstateRevenueNet_lbl" xml:lang="en-US">Total revenues</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CostOfRevenueAbstract" xlink:label="us-gaap_CostOfRevenueAbstract" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CostOfRevenueAbstract" xlink:to="us-gaap_CostOfRevenueAbstract_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CostOfRevenueAbstract_lbl" xml:lang="en-US">EXPENSES</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RealEstateTaxExpense" xlink:label="us-gaap_RealEstateTaxExpense" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RealEstateTaxExpense" xlink:to="us-gaap_RealEstateTaxExpense_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RealEstateTaxExpense_lbl" xml:lang="en-US">Real estate taxes</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_UtilitiesCosts" xlink:label="us-gaap_UtilitiesCosts" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UtilitiesCosts" xlink:to="us-gaap_UtilitiesCosts_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_UtilitiesCosts_lbl" xml:lang="en-US">Utilities</label>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingCostsAndExpenses" xlink:to="us-gaap_OperatingCostsAndExpenses_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingCostsAndExpenses_lbl" xml:lang="en-US">Operating services</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GeneralContractorCosts" xlink:label="us-gaap_GeneralContractorCosts" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GeneralContractorCosts" xlink:to="us-gaap_GeneralContractorCosts_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_GeneralContractorCosts_lbl" xml:lang="en-US">Direct construction costs</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GeneralAndAdministrativeExpense" xlink:label="us-gaap_GeneralAndAdministrativeExpense" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GeneralAndAdministrativeExpense" xlink:to="us-gaap_GeneralAndAdministrativeExpense_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_GeneralAndAdministrativeExpense_lbl" xml:lang="en-US">General and administrative</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_GeneralAndAdministrativeExpense_lbl" xml:lang="en-US">General and Administrative Expense, Total</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DepreciationAndAmortization" xlink:label="us-gaap_DepreciationAndAmortization" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DepreciationAndAmortization" xlink:to="us-gaap_DepreciationAndAmortization_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DepreciationAndAmortization_lbl" xml:lang="en-US">Depreciation and amortization</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_DepreciationAndAmortization_lbl" xml:lang="en-US">Depreciation and amortization</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_DepreciationAndAmortization_lbl" xml:lang="en-US">Depreciation and amortization</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ImpairmentOfRealEstate" xlink:label="us-gaap_ImpairmentOfRealEstate" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ImpairmentOfRealEstate" xlink:to="us-gaap_ImpairmentOfRealEstate_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ImpairmentOfRealEstate_lbl" xml:lang="en-US">Impairment of property</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_ImpairmentOfRealEstate_lbl" xml:lang="en-US">Impairment of property</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/netLabel" xlink:label="us-gaap_ImpairmentOfRealEstate_lbl" xml:lang="en-US">Impairment charge on rental property</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ImpairmentOfRealEstate_lbl" xml:lang="en-US">Impairment charge on property</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ImpairmentOfRealEstate_lbl" xml:lang="en-US">Impairment charge on rental property</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CostsAndExpenses" xlink:label="us-gaap_CostsAndExpenses" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CostsAndExpenses" xlink:to="us-gaap_CostsAndExpenses_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CostsAndExpenses_lbl" xml:lang="en-US">Costs and Expenses</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CostsAndExpenses_lbl" xml:lang="en-US">Total expenses</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_CostsAndExpenses_lbl" xml:lang="en-US">Total expenses</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="us-gaap_OperatingIncomeLoss" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingIncomeLoss" xlink:to="us-gaap_OperatingIncomeLoss_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingIncomeLoss_lbl" xml:lang="en-US">Operating income</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_OperatingIncomeLoss_lbl" xml:lang="en-US">Operating income</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NonoperatingIncomeExpenseAbstract" xlink:label="us-gaap_NonoperatingIncomeExpenseAbstract" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NonoperatingIncomeExpenseAbstract" xlink:to="us-gaap_NonoperatingIncomeExpenseAbstract_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NonoperatingIncomeExpenseAbstract_lbl" xml:lang="en-US">OTHER (EXPENSE) INCOME</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InterestExpense" xlink:label="us-gaap_InterestExpense" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestExpense" xlink:to="us-gaap_InterestExpense_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InterestExpense_lbl" xml:lang="en-US">Interest expense</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_InterestExpense_lbl" xml:lang="en-US">Interest expense</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_InterestExpense_lbl" xml:lang="en-US">Interest Expense, Total</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InvestmentIncomeInterestAndDividend" xlink:label="us-gaap_InvestmentIncomeInterestAndDividend" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentIncomeInterestAndDividend" xlink:to="us-gaap_InvestmentIncomeInterestAndDividend_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InvestmentIncomeInterestAndDividend_lbl" xml:lang="en-US">Interest and other investment income</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_InvestmentIncomeInterestAndDividend_lbl" xml:lang="en-US">Investment Income, Interest and Dividend, Total</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromEquityMethodInvestments" xlink:label="us-gaap_IncomeLossFromEquityMethodInvestments" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeLossFromEquityMethodInvestments" xlink:to="us-gaap_IncomeLossFromEquityMethodInvestments_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeLossFromEquityMethodInvestments_lbl" xml:lang="en-US">Equity in earnings (loss) of unconsolidated joint ventures</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_IncomeLossFromEquityMethodInvestments_lbl" xml:lang="en-US">Equity in (earnings) loss of unconsolidated joint venture, net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncomeLossFromEquityMethodInvestments_lbl" xml:lang="en-US">Company's equity in earnings (loss) of unconsolidated joint ventures</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_IncomeLossFromEquityMethodInvestments_lbl" xml:lang="en-US">Income (Loss) from Equity Method Investments, Total</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt" xlink:label="us-gaap_GainsLossesOnExtinguishmentOfDebt" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GainsLossesOnExtinguishmentOfDebt" xlink:to="us-gaap_GainsLossesOnExtinguishmentOfDebt_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_GainsLossesOnExtinguishmentOfDebt_lbl" xml:lang="en-US">Gains Losses On Extinguishment Of Debt</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_GainsLossesOnExtinguishmentOfDebt_lbl" xml:lang="en-US">Loss from early extinguishment of debt</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_GainsLossesOnExtinguishmentOfDebt_lbl" xml:lang="en-US">Loss from early extinguishment of debt</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_GainsLossesOnExtinguishmentOfDebt_lbl" xml:lang="en-US">Gains (Losses) on Extinguishment of Debt, Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_GainsLossesOnExtinguishmentOfDebt_lbl" xml:lang="en-US">Loss from early extinguishment of debt</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_GainOnReductionOfOtherObligations" xlink:label="cli_GainOnReductionOfOtherObligations" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_GainOnReductionOfOtherObligations" xlink:to="cli_GainOnReductionOfOtherObligations_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_GainOnReductionOfOtherObligations_lbl" xml:lang="en-US">Adjustment in the reporting period for any remaining unused balance of acquired lease obligations at expiration.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_GainOnReductionOfOtherObligations_lbl" xml:lang="en-US">Gain On Reduction Of Other Obligations</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="cli_GainOnReductionOfOtherObligations_lbl" xml:lang="en-US">Gain on reduction of other obligations</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="cli_GainOnReductionOfOtherObligations_lbl" xml:lang="en-US">Gain on reduction of other obligations</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="us-gaap_NonoperatingIncomeExpense" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NonoperatingIncomeExpense" xlink:to="us-gaap_NonoperatingIncomeExpense_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NonoperatingIncomeExpense_lbl" xml:lang="en-US">Nonoperating Income (Expense)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NonoperatingIncomeExpense_lbl" xml:lang="en-US">Total other (expense) income</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest" xlink:label="us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest" xlink:to="us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_lbl" xml:lang="en-US">Income from continuing operations</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_lbl" xml:lang="en-US">Income (loss) from continuing operations</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_lbl" xml:lang="en-US">Income from continuing operations</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_lbl" xml:lang="en-US">Income from continuing operations</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DiscontinuedOperationsAndDisposalGroupsAbstract" xlink:label="us-gaap_DiscontinuedOperationsAndDisposalGroupsAbstract" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DiscontinuedOperationsAndDisposalGroupsAbstract" xlink:to="us-gaap_DiscontinuedOperationsAndDisposalGroupsAbstract_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DiscontinuedOperationsAndDisposalGroupsAbstract_lbl" xml:lang="en-US">Discontinued Operations [Abstract]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DiscontinuedOperationsAndDisposalGroupsAbstract_lbl" xml:lang="en-US">Discontinued operations:</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax" xlink:label="us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax" xlink:to="us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax_lbl" xml:lang="en-US">Income (loss) from discontinued operations for diluted earnings per share</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax_lbl" xml:lang="en-US">Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, Net of Tax</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax_lbl" xml:lang="en-US">Income from discontinued operations before gains (losses) and unrealized losses on disposition of rental property</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax_lbl" xml:lang="en-US">Income from discontinued operations before gains (losses) and unrealized losses on disposition of rental property</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax_lbl" xml:lang="en-US">Income (loss) from discontinued operations</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ImpairmentOfRealEstateDiscontinuedOperations" xlink:label="cli_ImpairmentOfRealEstateDiscontinuedOperations" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ImpairmentOfRealEstateDiscontinuedOperations" xlink:to="cli_ImpairmentOfRealEstateDiscontinuedOperations_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ImpairmentOfRealEstateDiscontinuedOperations_lbl" xml:lang="en-US">The charge against earnings for a property classified in discontinued operations during the reporting period to reduce the carrying amount of real property to fair value.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ImpairmentOfRealEstateDiscontinuedOperations_lbl" xml:lang="en-US">Impairment Of Real Estate Discontinued Operations</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="cli_ImpairmentOfRealEstateDiscontinuedOperations_lbl" xml:lang="en-US">Impairment charge on rental property from discontinued operations</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ImpairmentOfRealEstateDiscontinuedOperations_lbl" xml:lang="en-US">Impairment charge on rental property</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GainLossOnDispositionOfAssets" xlink:label="us-gaap_GainLossOnDispositionOfAssets" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GainLossOnDispositionOfAssets" xlink:to="us-gaap_GainLossOnDispositionOfAssets_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_GainLossOnDispositionOfAssets_lbl" xml:lang="en-US">Gain (Loss) on Disposition of Assets</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_GainLossOnDispositionOfAssets_lbl" xml:lang="en-US">Realized gains (losses) and unrealized losses on disposition of rental property, net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_GainLossOnDispositionOfAssets_lbl" xml:lang="en-US">Gain (Loss) on Disposition of Assets, Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_GainLossOnDispositionOfAssets_lbl" xml:lang="en-US">Realized gains (losses) and unrealized losses on disposition of rental property, net</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax" xlink:label="us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax" xlink:to="us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax_lbl" xml:lang="en-US">Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_ProfitLoss_lbl" xml:lang="en-US">Net income</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MinorityInterestInNetIncomeLossJointVenturePartners" xlink:label="us-gaap_MinorityInterestInNetIncomeLossJointVenturePartners" />
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_MinorityInterestInNetIncomeLossOperatingPartnerships_lbl" xml:lang="en-US">Noncontrolling interest in Operating Partnership</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:label="us-gaap_MinorityInterestInNetIncomeLossOperatingPartnerships_lbl" xml:lang="en-US">Noncontrolling interest in Operating Partnership</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="cli_NoncontrollingInterestInDiscontinuedOperations_lbl" xml:lang="en-US">Noncontrolling interest in discontinued operations</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:label="cli_NoncontrollingInterestInDiscontinuedOperations_lbl" xml:lang="en-US">Noncontrolling interest in discontinued operations</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DividendsPreferredStock" xlink:label="us-gaap_DividendsPreferredStock" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendsPreferredStock" xlink:to="us-gaap_DividendsPreferredStock_lbl" />
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_DividendsPreferredStock_lbl" xml:lang="en-US">Preferred stock dividends</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:label="us-gaap_DividendsPreferredStock_lbl" xml:lang="en-US">Preferred stock dividends</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:label="us-gaap_DividendsPreferredStock_lbl" xml:lang="en-US">Preferred stock dividends</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DividendsPreferredStock_lbl" xml:lang="en-US">Preferred stock dividends</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_DividendsPreferredStock_lbl" xml:lang="en-US">Dividends, Preferred Stock, Total</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="us-gaap_NetIncomeLoss" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetIncomeLoss" xlink:to="us-gaap_NetIncomeLoss_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetIncomeLoss_lbl" xml:lang="en-US">Net Income Loss</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NetIncomeLoss_lbl" xml:lang="en-US">Net income available to common shareholders</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NetIncomeLoss_lbl" xml:lang="en-US">Net income available to common shareholders</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_NetIncomeLoss_lbl" xml:lang="en-US">Net operating income</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EarningsPerShareBasicAbstract" xlink:label="us-gaap_EarningsPerShareBasicAbstract" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EarningsPerShareBasicAbstract" xlink:to="us-gaap_EarningsPerShareBasicAbstract_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EarningsPerShareBasicAbstract_lbl" xml:lang="en-US">Basic earnings per common share:</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsPerBasicShare" xlink:label="us-gaap_IncomeLossFromContinuingOperationsPerBasicShare" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeLossFromContinuingOperationsPerBasicShare" xlink:to="us-gaap_IncomeLossFromContinuingOperationsPerBasicShare_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeLossFromContinuingOperationsPerBasicShare_lbl" xml:lang="en-US">Income Loss From Continuing Operations Per Basic Share</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncomeLossFromContinuingOperationsPerBasicShare_lbl" xml:lang="en-US">Income from continuing operations</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_IncomeLossFromContinuingOperationsPerBasicShare_lbl" xml:lang="en-US">Income from continuing operations available to common shareholders</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_IncomeLossFromContinuingOperationsPerBasicShare_lbl" xml:lang="en-US">Income from continuing operations available to common shareholders</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare" xlink:label="us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare" xlink:to="us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare_lbl" xml:lang="en-US">Income (Loss) from Discontinued Operations, Net of Tax, Per Basic Share</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare_lbl" xml:lang="en-US">Discontinued operations</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare_lbl" xml:lang="en-US">Discontinued operations</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare_lbl" xml:lang="en-US">Income (Loss) from Discontinued Operations, Net of Tax, Per Outstanding Share, Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare_lbl" xml:lang="en-US">Income (loss) from discontinued operations available to common shareholders</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EarningsPerShareBasic" xlink:label="us-gaap_EarningsPerShareBasic" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EarningsPerShareBasic" xlink:to="us-gaap_EarningsPerShareBasic_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xml:lang="en-US">Net income available to common shareholders</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xml:lang="en-US">Net income (loss) available to common shareholders</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xml:lang="en-US">Net income available to common shareholders</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EarningsPerShareDilutedAbstract" xlink:label="us-gaap_EarningsPerShareDilutedAbstract" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EarningsPerShareDilutedAbstract" xlink:to="us-gaap_EarningsPerShareDilutedAbstract_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EarningsPerShareDilutedAbstract_lbl" xml:lang="en-US">Diluted earnings per common share:</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare" xlink:label="us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare" xlink:to="us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare_lbl" xml:lang="en-US">Income Loss From Continuing Operations Per Diluted Share</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare_lbl" xml:lang="en-US">Income from continuing operations</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare_lbl" xml:lang="en-US">Income from continuing operations available to common shareholders</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare_lbl" xml:lang="en-US">Income from continuing operations available to common shareholders</label>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare" xlink:to="us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare_lbl" xml:lang="en-US">Income (Loss) from Discontinued Operations, Net of Tax, Per Diluted Share</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare_lbl" xml:lang="en-US">Discontinued operations</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare_lbl" xml:lang="en-US">Income (Loss) from Discontinued Operations, Net of Tax, Per Diluted Share, Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare_lbl" xml:lang="en-US">Income (loss) from discontinued operations available to common shareholders</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="us-gaap_EarningsPerShareDiluted" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EarningsPerShareDiluted" xlink:to="us-gaap_EarningsPerShareDiluted_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xml:lang="en-US">Earnings Per Share Diluted</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xml:lang="en-US">Net income (loss) available to common unitholders</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xml:lang="en-US">Net income available to common shareholders</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:to="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xml:lang="en-US">Basic weighted average shares outstanding</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xml:lang="en-US">Basic EPS shares</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xml:lang="en-US">Basic weighted average shares outstanding</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xml:lang="en-US">Weighted average common shares</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:to="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xml:lang="en-US">Diluted weighted average shares outstanding</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xml:lang="en-US">Weighted average common shares</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xml:lang="en-US">Diluted EPS Shares</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xml:lang="en-US">Diluted EPS Shares</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementOfStockholdersEquityAbstract" xlink:label="us-gaap_StatementOfStockholdersEquityAbstract" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementOfStockholdersEquityAbstract" xlink:to="us-gaap_StatementOfStockholdersEquityAbstract_lbl" />
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EquityComponentDomain" xlink:to="us-gaap_EquityComponentDomain_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EquityComponentDomain_lbl" xml:lang="en-US">Equity Component [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_EquityComponentDomain_lbl" xml:lang="en-US">Equity Component [Domain]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockMember_lbl" xml:lang="en-US">Preferred Stock [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PreferredStockMember_lbl" xml:lang="en-US">Preferred Stock [Member]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CommonStockMember" xlink:label="us-gaap_CommonStockMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockMember" xlink:to="us-gaap_CommonStockMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockMember_lbl" xml:lang="en-US">Common Stock [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CommonStockMember_lbl" xml:lang="en-US">Common Stock [Member]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember" xlink:label="us-gaap_AdditionalPaidInCapitalMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdditionalPaidInCapitalMember" xlink:to="us-gaap_AdditionalPaidInCapitalMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AdditionalPaidInCapitalMember_lbl" xml:lang="en-US">Additional Paid In Capital [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AdditionalPaidInCapitalMember_lbl" xml:lang="en-US">Additional Paid-In Capital [Member]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RetainedEarningsMember" xlink:label="us-gaap_RetainedEarningsMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RetainedEarningsMember" xlink:to="us-gaap_RetainedEarningsMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RetainedEarningsMember_lbl" xml:lang="en-US">Retained Earnings [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RetainedEarningsMember_lbl" xml:lang="en-US">Dividends In Excess Of Net Earnings [Member]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NoncontrollingInterestMember" xlink:label="us-gaap_NoncontrollingInterestMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NoncontrollingInterestMember" xlink:to="us-gaap_NoncontrollingInterestMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NoncontrollingInterestMember_lbl" xml:lang="en-US">Noncontrolling Interest [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NoncontrollingInterestMember_lbl" xml:lang="en-US">Noncontrolling Interests In Subsidiaries [Member]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SharesIssued" xlink:label="us-gaap_SharesIssued" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharesIssued" xlink:to="us-gaap_SharesIssued_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SharesIssued_lbl" xml:lang="en-US">Shares, Issued</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_SharesIssued_lbl" xml:lang="en-US">Balance, shares</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_SharesIssued_lbl" xml:lang="en-US">Balance, shares</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DividendsCommonStock" xlink:label="us-gaap_DividendsCommonStock" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendsCommonStock" xlink:to="us-gaap_DividendsCommonStock_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DividendsCommonStock_lbl" xml:lang="en-US">Common stock dividends</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_DividendsCommonStock_lbl" xml:lang="en-US">Common stock dividends</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_DividendsCommonStock_lbl" xml:lang="en-US">Dividends, Common Stock, Total</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders" xlink:label="us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders" xlink:to="us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_lbl" xml:lang="en-US">Common unit distributions</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_lbl" xml:lang="en-US">Common unit distributions</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueNewIssues" xlink:label="us-gaap_StockIssuedDuringPeriodValueNewIssues" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodValueNewIssues" xlink:to="us-gaap_StockIssuedDuringPeriodValueNewIssues_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodValueNewIssues_lbl" xml:lang="en-US">Common stock offering</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_StockIssuedDuringPeriodValueNewIssues_lbl" xml:lang="en-US">Common stock offering, value</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:to="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" xml:lang="en-US">Common stock offering, shares</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MinorityInterestPeriodIncreaseDecrease" xlink:label="us-gaap_MinorityInterestPeriodIncreaseDecrease" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MinorityInterestPeriodIncreaseDecrease" xlink:to="us-gaap_MinorityInterestPeriodIncreaseDecrease_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MinorityInterestPeriodIncreaseDecrease_lbl" xml:lang="en-US">Increase in noncontrolling interest</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_MinorityInterestPeriodIncreaseDecrease_lbl" xml:lang="en-US">Decrease in noncontrolling interest</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_MinorityInterestPeriodIncreaseDecrease_lbl" xml:lang="en-US">Decrease in noncontrolling interest</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_MinorityInterestPeriodIncreaseDecrease_lbl" xml:lang="en-US">Noncontrolling Interest, Period Increase (Decrease), Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_MinorityInterestPeriodIncreaseDecrease_lbl" xml:lang="en-US">Increase (decrease) in noncontrolling interests</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueConversionOfUnits" xlink:label="us-gaap_StockIssuedDuringPeriodValueConversionOfUnits" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodValueConversionOfUnits" xlink:to="us-gaap_StockIssuedDuringPeriodValueConversionOfUnits_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodValueConversionOfUnits_lbl" xml:lang="en-US">Redemption of common units for common stock, value</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StockIssuedDuringPeriodValueConversionOfUnits_lbl" xml:lang="en-US">Redemption of stock, value</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_StockIssuedDuringPeriodValueConversionOfUnits_lbl" xml:lang="en-US">Redemption of common units for common stock, value</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesConversionOfUnits" xlink:label="us-gaap_StockIssuedDuringPeriodSharesConversionOfUnits" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesConversionOfUnits" xlink:to="us-gaap_StockIssuedDuringPeriodSharesConversionOfUnits_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodSharesConversionOfUnits_lbl" xml:lang="en-US">Redemption of common units for common stock, shares</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StockIssuedDuringPeriodSharesConversionOfUnits_lbl" xml:lang="en-US">Redemption of stock, shares</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_StockIssuedDuringPeriodSharesConversionOfUnits_lbl" xml:lang="en-US">Redemption of common units for common stock, shares</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan" xlink:label="us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan" xlink:to="us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan_lbl" xml:lang="en-US">Shares issued under Dividend Reinvestment and Stock Purchase Plan, value</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan" xlink:label="us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan" xlink:to="us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan_lbl" xml:lang="en-US">Shares issued under Dividend Reinvestment and Stock Purchase Plan, shares</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised" xlink:label="us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised" xlink:to="us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_lbl" xml:lang="en-US">Stock options exercised, value</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:to="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl" xml:lang="en-US">Stock options exercised, shares</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl" xml:lang="en-US">Share Under Options - Exercised</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl" xml:lang="en-US">Share Under Options - Exercised</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue" xlink:to="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_lbl" xml:lang="en-US">Stock compensation, value</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_lbl" xml:lang="en-US">Stock compensation</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_lbl" xml:lang="en-US">Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition, Total</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation" xlink:label="us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation" xlink:to="us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_lbl" xml:lang="en-US">Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_lbl" xml:lang="en-US">Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures, Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_lbl" xml:lang="en-US">Stock compensation, shares</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_AccruedRedemptionOfPreferredStockShares" xlink:label="cli_AccruedRedemptionOfPreferredStockShares" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_AccruedRedemptionOfPreferredStockShares" xlink:to="cli_AccruedRedemptionOfPreferredStockShares_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_AccruedRedemptionOfPreferredStockShares_lbl" xml:lang="en-US">Accrued Redemption Of Preferred Stock Shares</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_AccruedRedemptionOfPreferredStockShares_lbl" xml:lang="en-US">Accrued Redemption Of Preferred Stock Shares</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_AccruedRedemptionOfPreferredStockShares_lbl" xml:lang="en-US">Redemption of preferred stock, shares</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_AccruedRedemptionOfPreferredStock" xlink:label="cli_AccruedRedemptionOfPreferredStock" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_AccruedRedemptionOfPreferredStock" xlink:to="cli_AccruedRedemptionOfPreferredStock_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_AccruedRedemptionOfPreferredStock_lbl" xml:lang="en-US">Accrued Redemption Of Preferred Stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_AccruedRedemptionOfPreferredStock_lbl" xml:lang="en-US">Accrued Redemption Of Preferred Stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="cli_AccruedRedemptionOfPreferredStock_lbl" xml:lang="en-US">Accrued redemption of preferred stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_AccruedRedemptionOfPreferredStock_lbl" xml:lang="en-US">Accrued redemption of preferred stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="cli_AccruedRedemptionOfPreferredStock_lbl" xml:lang="en-US">Redemption of preferred stock, value</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalReallocationOfMinorityInterest" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalReallocationOfMinorityInterest" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdjustmentsToAdditionalPaidInCapitalReallocationOfMinorityInterest" xlink:to="us-gaap_AdjustmentsToAdditionalPaidInCapitalReallocationOfMinorityInterest_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalReallocationOfMinorityInterest_lbl" xml:lang="en-US">Rebalancing of ownership percent between parent and subsidiaries</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AdjustmentsToAdditionalPaidInCapitalReallocationOfMinorityInterest_lbl" xml:lang="en-US">Decrease in additional paid-in capital</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementOfCashFlowsAbstract" xlink:label="us-gaap_StatementOfCashFlowsAbstract" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementOfCashFlowsAbstract" xlink:to="us-gaap_StatementOfCashFlowsAbstract_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StatementOfCashFlowsAbstract_lbl" xml:lang="en-US">Consolidated Statements Of Cash Flows [Abstract]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xml:lang="en-US">CASH FLOWS FROM OPERATING ACTIVITIES</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xml:lang="en-US">Adjustments to reconcile net income to net cash provided by Operating activities:</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization" xlink:label="us-gaap_DepreciationDepletionAndAmortization" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DepreciationDepletionAndAmortization" xlink:to="us-gaap_DepreciationDepletionAndAmortization_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DepreciationDepletionAndAmortization_lbl" xml:lang="en-US">Depreciation and amortization, including related intangible assets</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_DepreciationDepletionAndAmortization_lbl" xml:lang="en-US">Depreciation, Depletion and Amortization, Total</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_DepreciationAmortizationOnDiscontinuedOperations" xlink:label="cli_DepreciationAmortizationOnDiscontinuedOperations" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_DepreciationAmortizationOnDiscontinuedOperations" xlink:to="cli_DepreciationAmortizationOnDiscontinuedOperations_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_DepreciationAmortizationOnDiscontinuedOperations_lbl" xml:lang="en-US">Depreciation Amortization On Discontinued Operations</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_DepreciationAmortizationOnDiscontinuedOperations_lbl" xml:lang="en-US">Depreciation Amortization On Discontinued Operations</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="cli_DepreciationAmortizationOnDiscontinuedOperations_lbl" xml:lang="en-US">Depreciation and amortization on discontinued operations</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:label="cli_DepreciationAmortizationOnDiscontinuedOperations_lbl" xml:lang="en-US">Depreciation and amortization</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_DepreciationAmortizationOnDiscontinuedOperations_lbl" xml:lang="en-US">Depreciation and amortization on discontinued operations</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:label="us-gaap_ShareBasedCompensation" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensation" xlink:to="us-gaap_ShareBasedCompensation_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensation_lbl" xml:lang="en-US">Stock compensation</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ShareBasedCompensation_lbl" xml:lang="en-US">Amortization of stock compensation</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_ShareBasedCompensation_lbl" xml:lang="en-US">Amortization of stock compensation</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AmortizationOfFinancingCostsAndDiscounts" xlink:label="us-gaap_AmortizationOfFinancingCostsAndDiscounts" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AmortizationOfFinancingCostsAndDiscounts" xlink:to="us-gaap_AmortizationOfFinancingCostsAndDiscounts_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AmortizationOfFinancingCostsAndDiscounts_lbl" xml:lang="en-US">Amortization of deferred financing costs and debt discount</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_AmortizationOfFinancingCostsAndDiscounts_lbl" xml:lang="en-US">Amortization of Financing Costs and Discounts, Total</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GainLossOnDispositionOfProperty" xlink:label="us-gaap_GainLossOnDispositionOfProperty" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GainLossOnDispositionOfProperty" xlink:to="us-gaap_GainLossOnDispositionOfProperty_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_GainLossOnDispositionOfProperty_lbl" xml:lang="en-US">Gain (Loss) on Disposition of Property</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_GainLossOnDispositionOfProperty_lbl" xml:lang="en-US">Realized gains on disposition of rental property</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:label="us-gaap_GainLossOnDispositionOfProperty_lbl" xml:lang="en-US">(Realized gains) unrealized losses on disposition of rental property</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_GainLossOnDispositionOfProperty_lbl" xml:lang="en-US">Gain on disposal of office property</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_GainLossOnDispositionOfProperty_lbl" xml:lang="en-US">Gain (Loss) on Disposition of Property, Total</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityMethodInvestmentDividendsOrDistributions" xlink:label="us-gaap_EquityMethodInvestmentDividendsOrDistributions" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EquityMethodInvestmentDividendsOrDistributions" xlink:to="us-gaap_EquityMethodInvestmentDividendsOrDistributions_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EquityMethodInvestmentDividendsOrDistributions_lbl" xml:lang="en-US">Equity Method Investment Dividends Or Distributions</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_EquityMethodInvestmentDividendsOrDistributions_lbl" xml:lang="en-US">Distributions of cumulative earnings from unconsolidated joint ventures</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_EquityMethodInvestmentDividendsOrDistributions_lbl" xml:lang="en-US">Distributions of cumulative earnings from unconsolidated joint ventures</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:to="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" xml:lang="en-US">Changes in operating assets and liabilities:</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncreaseDecreaseInDeferredRentReceivables" xlink:label="us-gaap_IncreaseDecreaseInDeferredRentReceivables" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInDeferredRentReceivables" xlink:to="us-gaap_IncreaseDecreaseInDeferredRentReceivables_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInDeferredRentReceivables_lbl" xml:lang="en-US">Increase in unbilled rents receivable, net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_IncreaseDecreaseInDeferredRentReceivables_lbl" xml:lang="en-US">Increase in unbilled rents receivable, net</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingAssets" xlink:label="us-gaap_IncreaseDecreaseInOtherOperatingAssets" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInOtherOperatingAssets" xlink:to="us-gaap_IncreaseDecreaseInOtherOperatingAssets_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInOtherOperatingAssets_lbl" xml:lang="en-US">Increase in deferred charges and other assets, net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_IncreaseDecreaseInOtherOperatingAssets_lbl" xml:lang="en-US">(Increase) decrease in deferred charges and other assets, net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_IncreaseDecreaseInOtherOperatingAssets_lbl" xml:lang="en-US">(Increase) decrease in deferred charges and other assets, net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncreaseDecreaseInOtherOperatingAssets_lbl" xml:lang="en-US">(Increase) decrease in deferred charges and other assets, net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_IncreaseDecreaseInOtherOperatingAssets_lbl" xml:lang="en-US">Increase (Decrease) in Other Operating Assets, Total</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncreaseDecreaseInLeasingReceivables" xlink:label="us-gaap_IncreaseDecreaseInLeasingReceivables" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInLeasingReceivables" xlink:to="us-gaap_IncreaseDecreaseInLeasingReceivables_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInLeasingReceivables_lbl" xml:lang="en-US">(Increase) decrease in accounts receivable, net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_IncreaseDecreaseInLeasingReceivables_lbl" xml:lang="en-US">(Increase) decrease in accounts receivable, net</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities" xlink:to="us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_lbl" xml:lang="en-US">Increase (decrease) in accounts payable, accrued expenses and other liabilities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_lbl" xml:lang="en-US">Increase (decrease) in accounts payable, accrued expenses and other liabilities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_lbl" xml:lang="en-US">Decrease in accounts payable, accrued expenses and other liabilities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_lbl" xml:lang="en-US">Increase (decrease) in accounts payable, accrued expenses and other liabilities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_lbl" xml:lang="en-US">Increase (Decrease) in Accounts Payable and Accrued Liabilities, Total</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_IncreaseDecreaseInRentsReceivedInAdvanceAndSecurityDeposits" xlink:label="cli_IncreaseDecreaseInRentsReceivedInAdvanceAndSecurityDeposits" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_IncreaseDecreaseInRentsReceivedInAdvanceAndSecurityDeposits" xlink:to="cli_IncreaseDecreaseInRentsReceivedInAdvanceAndSecurityDeposits_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_IncreaseDecreaseInRentsReceivedInAdvanceAndSecurityDeposits_lbl" xml:lang="en-US">The net change during the reporting period in the amount at the balance sheet date including both: (a) rents and other amounts paid in advance by tenants and clients; and (b) security deposits paid in advance to protect the provider of a service, such as a lessor, against damage or nonpayment by the tenant (lessee) during the term of the agreement.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_IncreaseDecreaseInRentsReceivedInAdvanceAndSecurityDeposits_lbl" xml:lang="en-US">Increase Decrease In Rents Received In Advance And Security Deposits</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="cli_IncreaseDecreaseInRentsReceivedInAdvanceAndSecurityDeposits_lbl" xml:lang="en-US">(Decrease) increase in rents received in advance and security deposits</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_IncreaseDecreaseInRentsReceivedInAdvanceAndSecurityDeposits_lbl" xml:lang="en-US">Increase (decrease) in rents received in advance and security deposits</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="cli_IncreaseDecreaseInRentsReceivedInAdvanceAndSecurityDeposits_lbl" xml:lang="en-US">(Decrease) increase in rents received in advance and security deposits</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncreaseDecreaseInInterestPayableNet" xlink:label="us-gaap_IncreaseDecreaseInInterestPayableNet" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInInterestPayableNet" xlink:to="us-gaap_IncreaseDecreaseInInterestPayableNet_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInInterestPayableNet_lbl" xml:lang="en-US">Decrease in accrued interest payable</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_IncreaseDecreaseInInterestPayableNet_lbl" xml:lang="en-US">Decrease in accrued interest payable</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncreaseDecreaseInInterestPayableNet_lbl" xml:lang="en-US">(Decrease) increase in accrued interest payable</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_IncreaseDecreaseInInterestPayableNet_lbl" xml:lang="en-US">Decrease in accrued interest payable</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_IncreaseDecreaseInInterestPayableNet_lbl" xml:lang="en-US">(Decrease) increase in accrued interest payable</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xml:lang="en-US">Net cash provided by operating activities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xml:lang="en-US">Net cash provided by operating activities</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_lbl" xml:lang="en-US">CASH FLOWS FROM INVESTING ACTIVITIES</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PaymentsToAcquireAndDevelopRealEstate" xlink:label="us-gaap_PaymentsToAcquireAndDevelopRealEstate" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsToAcquireAndDevelopRealEstate" xlink:to="us-gaap_PaymentsToAcquireAndDevelopRealEstate_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PaymentsToAcquireAndDevelopRealEstate_lbl" xml:lang="en-US">Additions to rental property and related intangibles</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:label="us-gaap_PaymentsToAcquireAndDevelopRealEstate_lbl" xml:lang="en-US">Additions to rental property and related intangibles</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_PaymentsToAcquireAndDevelopRealEstate_lbl" xml:lang="en-US">Additions to rental property and related intangibles</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_RepaymentOfNotesReceivable" xlink:label="cli_RepaymentOfNotesReceivable" />
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_RepaymentOfNotesReceivable_lbl" xml:lang="en-US">Repayment of notes receivable</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_RepaymentOfNotesReceivable_lbl" xml:lang="en-US">Repayment Of Notes Receivable</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="cli_RepaymentOfNotesReceivable_lbl" xml:lang="en-US">Repayment of notes receivable</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PaymentsToAcquireInterestInJointVenture" xlink:label="us-gaap_PaymentsToAcquireInterestInJointVenture" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsToAcquireInterestInJointVenture" xlink:to="us-gaap_PaymentsToAcquireInterestInJointVenture_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PaymentsToAcquireInterestInJointVenture_lbl" xml:lang="en-US">Investment in unconsolidated joint ventures</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_PaymentsToAcquireInterestInJointVenture_lbl" xml:lang="en-US">Investment in unconsolidated joint ventures</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PaymentsToAcquireInterestInJointVenture_lbl" xml:lang="en-US">Acquisition cost</label>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_DistributionsInExcessOfCumulativeEarningsFromJvs" xlink:to="cli_DistributionsInExcessOfCumulativeEarningsFromJvs_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_DistributionsInExcessOfCumulativeEarningsFromJvs_lbl" xml:lang="en-US">This item represents the amount of distributions in excess of net earnings, which represents a return of investment, received from unconsolidated joint ventures and subsidiaries; these investments are accounted for under the equity method of accounting.</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncreaseDecreaseInRestrictedCash" xlink:label="us-gaap_IncreaseDecreaseInRestrictedCash" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInRestrictedCash" xlink:to="us-gaap_IncreaseDecreaseInRestrictedCash_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncreaseDecreaseInRestrictedCash_lbl" xml:lang="en-US">Increase Decrease In Restricted Cash</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_IncreaseDecreaseInRestrictedCash_lbl" xml:lang="en-US">(Increase) decrease in restricted cash</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:label="us-gaap_IncreaseDecreaseInRestrictedCash_lbl" xml:lang="en-US">(Increase) decrease in restricted cash</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_IncreaseDecreaseInRestrictedCash_lbl" xml:lang="en-US">(Increase) decrease in restricted cash</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_IncreaseDecreaseInRestrictedCash_lbl" xml:lang="en-US">Decrease (increase) in restricted cash</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl" xml:lang="en-US">Net cash used in investing activities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl" xml:lang="en-US">Net cash used in investing activities</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" xml:lang="en-US">CASH FLOW FROM FINANCING ACTIVITIES</label>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromUnsecuredLinesOfCredit" xlink:to="us-gaap_ProceedsFromUnsecuredLinesOfCredit_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromUnsecuredLinesOfCredit_lbl" xml:lang="en-US">Borrowings from revolving credit facility</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_ProceedsFromUnsecuredLinesOfCredit_lbl" xml:lang="en-US">Borrowings from revolving credit facility</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ProceedsFromUnsecuredLinesOfCredit_lbl" xml:lang="en-US">Unsecured credit facility</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RepaymentsOfLinesOfCredit" xlink:label="us-gaap_RepaymentsOfLinesOfCredit" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RepaymentsOfLinesOfCredit" xlink:to="us-gaap_RepaymentsOfLinesOfCredit_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RepaymentsOfLinesOfCredit_lbl" xml:lang="en-US">Repayment of revolving credit facility and money market loans</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_RepaymentsOfLinesOfCredit_lbl" xml:lang="en-US">Repayment of revolving credit facility and money market loans</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProceedsFromIssuanceOfUnsecuredDebt" xlink:label="us-gaap_ProceedsFromIssuanceOfUnsecuredDebt" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromIssuanceOfUnsecuredDebt" xlink:to="us-gaap_ProceedsFromIssuanceOfUnsecuredDebt_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromIssuanceOfUnsecuredDebt_lbl" xml:lang="en-US">Proceeds from senior unsecured notes</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RepaymentsOfUnsecuredDebt" xlink:label="us-gaap_RepaymentsOfUnsecuredDebt" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RepaymentsOfUnsecuredDebt" xlink:to="us-gaap_RepaymentsOfUnsecuredDebt_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RepaymentsOfUnsecuredDebt_lbl" xml:lang="en-US">Repayments of senior unsecured notes</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_RepaymentsOfUnsecuredDebt_lbl" xml:lang="en-US">Repayment of senior unsecured notes</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProceedsFromIssuanceOfSecuredDebt" xlink:label="us-gaap_ProceedsFromIssuanceOfSecuredDebt" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromIssuanceOfSecuredDebt" xlink:to="us-gaap_ProceedsFromIssuanceOfSecuredDebt_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromIssuanceOfSecuredDebt_lbl" xml:lang="en-US">Proceeds from mortgages and loans payable</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_ProceedsFromIssuanceOfSecuredDebt_lbl" xml:lang="en-US">Proceeds from mortgages</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RepaymentsOfSecuredDebt" xlink:label="us-gaap_RepaymentsOfSecuredDebt" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RepaymentsOfSecuredDebt" xlink:to="us-gaap_RepaymentsOfSecuredDebt_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RepaymentsOfSecuredDebt_lbl" xml:lang="en-US">Repayment of mortgages, loans payable and other obligations</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_RepaymentsOfSecuredDebt_lbl" xml:lang="en-US">Repayment of mortgages, loans payable and other obligations</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RepaymentsOfSecuredDebt_lbl" xml:lang="en-US">Repayment of mortgages, loans payable</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PaymentsOfFinancingCosts" xlink:label="us-gaap_PaymentsOfFinancingCosts" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsOfFinancingCosts" xlink:to="us-gaap_PaymentsOfFinancingCosts_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PaymentsOfFinancingCosts_lbl" xml:lang="en-US">Payment of financing costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_PaymentsOfFinancingCosts_lbl" xml:lang="en-US">Payment of financing costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_PaymentsOfFinancingCosts_lbl" xml:lang="en-US">Payments of Financing Costs, Total</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStock" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:to="us-gaap_ProceedsFromIssuanceOfCommonStock_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStock_lbl" xml:lang="en-US">Proceeds from offering of Common Stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStock_lbl" xml:lang="en-US">Proceeds from offering of common stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStock_lbl" xml:lang="en-US">Proceeds from issuance of common stock</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_RedemptionOfPreferredStock" xlink:label="cli_RedemptionOfPreferredStock" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_RedemptionOfPreferredStock" xlink:to="cli_RedemptionOfPreferredStock_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_RedemptionOfPreferredStock_lbl" xml:lang="en-US">Redemption of preferred stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_RedemptionOfPreferredStock_lbl" xml:lang="en-US">Redemption of Preferred Stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="cli_RedemptionOfPreferredStock_lbl" xml:lang="en-US">Redemption of preferred stock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_RedemptionOfPreferredStock_lbl" xml:lang="en-US">Redemption of preferred stock</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProceedsFromStockOptionsExercised" xlink:label="us-gaap_ProceedsFromStockOptionsExercised" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromStockOptionsExercised" xlink:to="us-gaap_ProceedsFromStockOptionsExercised_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ProceedsFromStockOptionsExercised_lbl" xml:lang="en-US">Proceeds from stock options exercised</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PaymentsOfCapitalDistribution" xlink:label="us-gaap_PaymentsOfCapitalDistribution" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsOfCapitalDistribution" xlink:to="us-gaap_PaymentsOfCapitalDistribution_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PaymentsOfCapitalDistribution_lbl" xml:lang="en-US">Payment of dividends and distributions</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_PaymentsOfCapitalDistribution_lbl" xml:lang="en-US">Payment of dividends and distributions</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:label="us-gaap_PaymentsOfCapitalDistribution_lbl" xml:lang="en-US">Payment of dividends and distributions</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_PaymentsOfCapitalDistribution_lbl" xml:lang="en-US">Payment of dividends and distributions</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xml:lang="en-US">Net cash provided used in financing activities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xml:lang="en-US">Net cash (used in) provided by financing activities</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:label="us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:to="us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_lbl" xml:lang="en-US">Net (decrease) increase in cash and cash equivalents</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_lbl" xml:lang="en-US">Net (decrease) increase in cash and cash equivalents</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:to="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_lbl" xml:lang="en-US">Organization And Basis Of Presentation [Abstract]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock" />
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock_lbl" xml:lang="en-US">Organization Consolidation And Presentation Of Financial Statements Disclosure TextBlock</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="us-gaap_SegmentReportingAbstract" />
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SegmentReportingAbstract_lbl" xml:lang="en-US">Segment Reporting [Abstract]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SegmentReportingDisclosureTextBlock" xlink:label="us-gaap_SegmentReportingDisclosureTextBlock" />
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SegmentReportingDisclosureTextBlock_lbl" xml:lang="en-US">Segment Reporting Disclosure Textblock</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_SegmentReportingDisclosureTextBlock_lbl" xml:lang="en-US">Segment Reporting</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyTransactionsAbstract" xlink:label="us-gaap_RelatedPartyTransactionsAbstract" />
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyTransactionsDisclosureTextBlock" xlink:label="us-gaap_RelatedPartyTransactionsDisclosureTextBlock" />
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RelatedPartyTransactionsDisclosureTextBlock_lbl" xml:lang="en-US">Related Party Transactions Disclosure [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RelatedPartyTransactionsDisclosureTextBlock_lbl" xml:lang="en-US">Related Party Transactions</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_QuarterlyFinancialDataAbstract" xlink:label="us-gaap_QuarterlyFinancialDataAbstract" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_QuarterlyFinancialDataAbstract" xlink:to="us-gaap_QuarterlyFinancialDataAbstract_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_QuarterlyFinancialDataAbstract_lbl" xml:lang="en-US">Condensed Quarterly Financial Information [Abstract]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_QuarterlyFinancialInformationTextBlock" xlink:label="us-gaap_QuarterlyFinancialInformationTextBlock" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_QuarterlyFinancialInformationTextBlock" xlink:to="us-gaap_QuarterlyFinancialInformationTextBlock_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_QuarterlyFinancialInformationTextBlock_lbl" xml:lang="en-US">Quarterly Financial Information [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_QuarterlyFinancialInformationTextBlock_lbl" xml:lang="en-US">Condensed Quarterly Financial Information</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RealEstateAndAccumulatedDepreciationInitialCostAbstract" xlink:label="us-gaap_RealEstateAndAccumulatedDepreciationInitialCostAbstract" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RealEstateAndAccumulatedDepreciationInitialCostAbstract" xlink:to="us-gaap_RealEstateAndAccumulatedDepreciationInitialCostAbstract_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RealEstateAndAccumulatedDepreciationInitialCostAbstract_lbl" xml:lang="en-US">Real Estate Investments And Accumulated Depreciation [Abstract]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RealEstateAndAccumulatedDepreciationDisclosureTextBlock" xlink:label="us-gaap_RealEstateAndAccumulatedDepreciationDisclosureTextBlock" />
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RealEstateAndAccumulatedDepreciationDisclosureTextBlock_lbl" xml:lang="en-US">Real Estate and Accumulated Depreciation Disclosure [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RealEstateAndAccumulatedDepreciationDisclosureTextBlock_lbl" xml:lang="en-US">Real Estate Investments And Accumulated Depreciation</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PropertyPlantAndEquipmentPolicyTextBlock" xlink:label="us-gaap_PropertyPlantAndEquipmentPolicyTextBlock" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentPolicyTextBlock" xlink:to="us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_lbl" xml:lang="en-US">Property, Plant and Equipment, Policy [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_lbl" xml:lang="en-US">Estimated Useful Lives of Assets</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_lbl" xml:lang="en-US">Rental Property</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RealEstateHeldForDevelopmentAndSalePolicy" xlink:label="us-gaap_RealEstateHeldForDevelopmentAndSalePolicy" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RealEstateHeldForDevelopmentAndSalePolicy" xlink:to="us-gaap_RealEstateHeldForDevelopmentAndSalePolicy_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RealEstateHeldForDevelopmentAndSalePolicy_lbl" xml:lang="en-US">Real Estate Held for Development and Sale, Policy</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_RealEstateHeldForDevelopmentAndSalePolicy_lbl" xml:lang="en-US">Rental Property Held For Sale And Discontinued Operations</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityMethodInvestmentsPolicy" xlink:label="us-gaap_EquityMethodInvestmentsPolicy" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EquityMethodInvestmentsPolicy" xlink:to="us-gaap_EquityMethodInvestmentsPolicy_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EquityMethodInvestmentsPolicy_lbl" xml:lang="en-US">Equity Method Investments, Policy</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_EquityMethodInvestmentsPolicy_lbl" xml:lang="en-US">Investments In Unconsolidated Joint Ventures</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CashAndCashEquivalentsPolicyTextBlock" xlink:label="us-gaap_CashAndCashEquivalentsPolicyTextBlock" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashAndCashEquivalentsPolicyTextBlock" xlink:to="us-gaap_CashAndCashEquivalentsPolicyTextBlock_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CashAndCashEquivalentsPolicyTextBlock_lbl" xml:lang="en-US">Cash and Cash Equivalents, Policy [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CashAndCashEquivalentsPolicyTextBlock_lbl" xml:lang="en-US">Cash And Cash Equivalents</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MarketableSecuritiesPolicy" xlink:label="us-gaap_MarketableSecuritiesPolicy" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MarketableSecuritiesPolicy" xlink:to="us-gaap_MarketableSecuritiesPolicy_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MarketableSecuritiesPolicy_lbl" xml:lang="en-US">Marketable Securities, Policy</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_MarketableSecuritiesPolicy_lbl" xml:lang="en-US">Marketable Securities</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_DeferredFinancingCostsPolicyTextBlock" xlink:label="cli_DeferredFinancingCostsPolicyTextBlock" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_DeferredFinancingCostsPolicyTextBlock" xlink:to="cli_DeferredFinancingCostsPolicyTextBlock_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_DeferredFinancingCostsPolicyTextBlock_lbl" xml:lang="en-US">Disclosure of entity's accounting policy for costs incurred in connection with obtaining finance.</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_DeferredLeasingCostsPolicyTextBlock_lbl" xml:lang="en-US">Disclosure of the entity's accounting policy for costs incurred in connection with leases.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_DeferredLeasingCostsPolicyTextBlock_lbl" xml:lang="en-US">Deferred Leasing Costs Policy Text Block</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ReceivablesTradeAndOtherAccountsReceivableAllowanceForDoubtfulAccountsPolicy_lbl" xml:lang="en-US">Receivables, Trade and Other Accounts Receivable, Allowance for Doubtful Accounts, Policy</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ReceivablesTradeAndOtherAccountsReceivableAllowanceForDoubtfulAccountsPolicy_lbl" xml:lang="en-US">Allowance For Doubtful Accounts</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeTaxPolicyTextBlock" xlink:label="us-gaap_IncomeTaxPolicyTextBlock" />
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeTaxPolicyTextBlock_lbl" xml:lang="en-US">Income Tax, Policy [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_IncomeTaxPolicyTextBlock_lbl" xml:lang="en-US">Income And Other Taxes</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EarningsPerSharePolicyTextBlock" xlink:label="us-gaap_EarningsPerSharePolicyTextBlock" />
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_EarningsPerSharePolicyTextBlock_lbl" xml:lang="en-US">Earnings Per Share</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_DividendsAndDistributionsPayablePolicyTextBlock_lbl" xml:lang="en-US">Disclosure of the entity's accounting policy for declaring and paying dividends and distributions.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_DividendsAndDistributionsPayablePolicyTextBlock_lbl" xml:lang="en-US">Dividends And Distributions Payable Policy Text Block</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="cli_DividendsAndDistributionsPayablePolicyTextBlock_lbl" xml:lang="en-US">Dividends And Distributions Payable</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_IssuanceCostsPolicyTextBlock" xlink:label="cli_IssuanceCostsPolicyTextBlock" />
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_IssuanceCostsPolicyTextBlock_lbl" xml:lang="en-US">Disclosure of the accounting policy for costs incurred in connection with stock issuances.</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="cli_IssuanceCostsPolicyTextBlock_lbl" xml:lang="en-US">Costs Incurred For Stock Issuances</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy" xlink:label="us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy" xlink:to="us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_lbl" xml:lang="en-US">Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_lbl" xml:lang="en-US">Stock Compensation</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OtherComprehensiveIncomePolicyTextBlock" xlink:label="cli_OtherComprehensiveIncomePolicyTextBlock" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OtherComprehensiveIncomePolicyTextBlock" xlink:to="cli_OtherComprehensiveIncomePolicyTextBlock_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OtherComprehensiveIncomePolicyTextBlock_lbl" xml:lang="en-US">Other Comprehensive Income Policy [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OtherComprehensiveIncomePolicyTextBlock_lbl" xml:lang="en-US">Other Comprehensive Income Policy Text Block</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="cli_OtherComprehensiveIncomePolicyTextBlock_lbl" xml:lang="en-US">Other Comprehensive Income</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ScheduleOfEstimatedUsefulLivesOfAssetsTextBlock" xlink:label="cli_ScheduleOfEstimatedUsefulLivesOfAssetsTextBlock" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ScheduleOfEstimatedUsefulLivesOfAssetsTextBlock" xlink:to="cli_ScheduleOfEstimatedUsefulLivesOfAssetsTextBlock_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ScheduleOfEstimatedUsefulLivesOfAssetsTextBlock_lbl" xml:lang="en-US">Schedule of Estimated Useful Lives of Assets [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ScheduleOfEstimatedUsefulLivesOfAssetsTextBlock_lbl" xml:lang="en-US">Schedule of Estimated Useful Lives of Assets [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ScheduleOfEstimatedUsefulLivesOfAssetsTextBlock_lbl" xml:lang="en-US">Estimated Useful Lives Of Assets</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ScheduleOfEquityMethodInvestmentSummarizedFinancialInformationBalanceSheetTableTextBlock" xlink:label="cli_ScheduleOfEquityMethodInvestmentSummarizedFinancialInformationBalanceSheetTableTextBlock" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ScheduleOfEquityMethodInvestmentSummarizedFinancialInformationBalanceSheetTableTextBlock" xlink:to="cli_ScheduleOfEquityMethodInvestmentSummarizedFinancialInformationBalanceSheetTableTextBlock_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ScheduleOfEquityMethodInvestmentSummarizedFinancialInformationBalanceSheetTableTextBlock_lbl" xml:lang="en-US">Schedule of Equity Method Investment, Summarized Financial Information, Balance Sheet [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ScheduleOfEquityMethodInvestmentSummarizedFinancialInformationBalanceSheetTableTextBlock_lbl" xml:lang="en-US">Schedule of Equity Method Investment, Summarized Financial Information, Balance Sheet [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ScheduleOfEquityMethodInvestmentSummarizedFinancialInformationBalanceSheetTableTextBlock_lbl" xml:lang="en-US">Summary Of The Results Of Financial Position</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ScheduleOfEquityMethodInvestmentSummarizedFinancialInformationIncomeStatementTableTextBlock" xlink:label="cli_ScheduleOfEquityMethodInvestmentSummarizedFinancialInformationIncomeStatementTableTextBlock" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ScheduleOfEquityMethodInvestmentSummarizedFinancialInformationIncomeStatementTableTextBlock" xlink:to="cli_ScheduleOfEquityMethodInvestmentSummarizedFinancialInformationIncomeStatementTableTextBlock_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ScheduleOfEquityMethodInvestmentSummarizedFinancialInformationIncomeStatementTableTextBlock_lbl" xml:lang="en-US">Schedule of Equity Method Investment, Summarized Financial Information, Income Statement [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ScheduleOfEquityMethodInvestmentSummarizedFinancialInformationIncomeStatementTableTextBlock_lbl" xml:lang="en-US">Schedule of Equity Method Investment, Summarized Financial Information, Income Statement [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ScheduleOfEquityMethodInvestmentSummarizedFinancialInformationIncomeStatementTableTextBlock_lbl" xml:lang="en-US">Summary Of The Results Of Operations</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ScheduleOfDeferredChargesAndOtherAssetsTextBlock" xlink:label="cli_ScheduleOfDeferredChargesAndOtherAssetsTextBlock" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ScheduleOfDeferredChargesAndOtherAssetsTextBlock" xlink:to="cli_ScheduleOfDeferredChargesAndOtherAssetsTextBlock_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ScheduleOfDeferredChargesAndOtherAssetsTextBlock_lbl" xml:lang="en-US">Schedule Of Deferred Charges And Other Assets [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ScheduleOfDeferredChargesAndOtherAssetsTextBlock_lbl" xml:lang="en-US">Schedule Of Deferred Charges And Other Assets [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ScheduleOfDeferredChargesAndOtherAssetsTextBlock_lbl" xml:lang="en-US">Deferred Charges And Other Assets</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTextBlock" xlink:label="us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTextBlock" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTextBlock" xlink:to="us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTextBlock_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTextBlock_lbl" xml:lang="en-US">Schedule Of Restricted Cash And Cash Equivalents Text Block</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ScheduleOfRestrictedCashAndCashEquivalentsTextBlock_lbl" xml:lang="en-US">Schedule Of Restricted Cash</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfDisposalGroupsIncludingDiscontinuedOperationsIncomeStatementBalanceSheetAndAdditionalDisclosuresTextBlock" xlink:label="us-gaap_ScheduleOfDisposalGroupsIncludingDiscontinuedOperationsIncomeStatementBalanceSheetAndAdditionalDisclosuresTextBlock" />
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfDisposalGroupsIncludingDiscontinuedOperationsIncomeStatementBalanceSheetAndAdditionalDisclosuresTextBlock_lbl" xml:lang="en-US">Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ScheduleOfDisposalGroupsIncludingDiscontinuedOperationsIncomeStatementBalanceSheetAndAdditionalDisclosuresTextBlock_lbl" xml:lang="en-US">Summary Of Income From Discontinued Operations And Related Realized And Unrealized Gains (Losses)</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ScheduleOfSeniorUnsecuredNotesTableTextBlock" xlink:label="cli_ScheduleOfSeniorUnsecuredNotesTableTextBlock" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ScheduleOfSeniorUnsecuredNotesTableTextBlock" xlink:to="cli_ScheduleOfSeniorUnsecuredNotesTableTextBlock_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ScheduleOfSeniorUnsecuredNotesTableTextBlock_lbl" xml:lang="en-US">Schedule of Senior Unsecured Notes [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ScheduleOfSeniorUnsecuredNotesTableTextBlock_lbl" xml:lang="en-US">Schedule of Senior Unsecured Notes [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ScheduleOfSeniorUnsecuredNotesTableTextBlock_lbl" xml:lang="en-US">Summary Of Senior Unsecured Notes</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ScheduleOfUnsecuredCreditRatingOperatingPartnershipsTableTextBlock" xlink:label="cli_ScheduleOfUnsecuredCreditRatingOperatingPartnershipsTableTextBlock" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ScheduleOfUnsecuredCreditRatingOperatingPartnershipsTableTextBlock" xlink:to="cli_ScheduleOfUnsecuredCreditRatingOperatingPartnershipsTableTextBlock_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ScheduleOfUnsecuredCreditRatingOperatingPartnershipsTableTextBlock_lbl" xml:lang="en-US">Schedule of Unsecured Credit Rating, Operating Partnerships [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ScheduleOfUnsecuredCreditRatingOperatingPartnershipsTableTextBlock_lbl" xml:lang="en-US">Schedule of Unsecured Credit Rating, Operating Partnerships [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ScheduleOfUnsecuredCreditRatingOperatingPartnershipsTableTextBlock_lbl" xml:lang="en-US">Change In The Operating Partnership's Unsecured Debt Ratings</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ScheduleOfSecuredDebtTableTextBlock" xlink:label="cli_ScheduleOfSecuredDebtTableTextBlock" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ScheduleOfSecuredDebtTableTextBlock" xlink:to="cli_ScheduleOfSecuredDebtTableTextBlock_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ScheduleOfSecuredDebtTableTextBlock_lbl" xml:lang="en-US">Schedule of Secured Debt [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ScheduleOfSecuredDebtTableTextBlock_lbl" xml:lang="en-US">Schedule of Secured Debt [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ScheduleOfSecuredDebtTableTextBlock_lbl" xml:lang="en-US">Summary Of Mortgages, Loans Payable And Other Obligations</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ScheduleOfLongTermDebtPrincipalPaymentTableTextBlock" xlink:label="cli_ScheduleOfLongTermDebtPrincipalPaymentTableTextBlock" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ScheduleOfLongTermDebtPrincipalPaymentTableTextBlock" xlink:to="cli_ScheduleOfLongTermDebtPrincipalPaymentTableTextBlock_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ScheduleOfLongTermDebtPrincipalPaymentTableTextBlock_lbl" xml:lang="en-US">Schedule of long term debt principal payment [table text block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ScheduleOfLongTermDebtPrincipalPaymentTableTextBlock_lbl" xml:lang="en-US">Schedule Of Long Term Debt Principal Payment [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ScheduleOfLongTermDebtPrincipalPaymentTableTextBlock_lbl" xml:lang="en-US">Schedule Of Long Term Debt Principal Payment</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock" xlink:label="us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock" xlink:to="us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock_lbl" xml:lang="en-US">Schedule Of Future Minimum Rental Payments For Operating Leases [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock_lbl" xml:lang="en-US">Future Minimum Rental Payments Of Ground Leases</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ScheduleOfFutureMinimumRentalsUnderNonCancelableOperatingLeaseTextBlock" xlink:label="cli_ScheduleOfFutureMinimumRentalsUnderNonCancelableOperatingLeaseTextBlock" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ScheduleOfFutureMinimumRentalsUnderNonCancelableOperatingLeaseTextBlock" xlink:to="cli_ScheduleOfFutureMinimumRentalsUnderNonCancelableOperatingLeaseTextBlock_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ScheduleOfFutureMinimumRentalsUnderNonCancelableOperatingLeaseTextBlock_lbl" xml:lang="en-US">Schedule Of Future Minimum Rentals Under Non-cancelable Operating Lease [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ScheduleOfFutureMinimumRentalsUnderNonCancelableOperatingLeaseTextBlock_lbl" xml:lang="en-US">Schedule Of Future Minimum Rentals Under Non-cancelable Operating Lease [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ScheduleOfFutureMinimumRentalsUnderNonCancelableOperatingLeaseTextBlock_lbl" xml:lang="en-US">Future Minimum Rentals To Be Received Under Non-Cancelable Operating Leases</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock" xlink:label="us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock" xlink:to="us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_lbl" xml:lang="en-US">Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_lbl" xml:lang="en-US">Schedule Of Stock Option Plans</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock" xlink:label="us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock" xlink:to="us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock_lbl" xml:lang="en-US">Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock_lbl" xml:lang="en-US">Schedule Of Restricted Stock Awards</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock" xlink:label="us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock" />
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_lbl" xml:lang="en-US">Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_lbl" xml:lang="en-US">Schedule Of Basic And Diluted Earnings Per Share</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ScheduleOfReconciliationOfSharesUsedInBasicEPSCalculationToSharesUsedInDilutedEPSCalculationTableTextBlock" xlink:label="cli_ScheduleOfReconciliationOfSharesUsedInBasicEPSCalculationToSharesUsedInDilutedEPSCalculationTableTextBlock" />
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ScheduleOfReconciliationOfSharesUsedInBasicEPSCalculationToSharesUsedInDilutedEPSCalculationTableTextBlock_lbl" xml:lang="en-US">Schedule of reconciliation of shares used in basic e p s calculation to shares used in diluted e p s calculation [table text block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ScheduleOfReconciliationOfSharesUsedInBasicEPSCalculationToSharesUsedInDilutedEPSCalculationTableTextBlock_lbl" xml:lang="en-US">Schedule Of Reconciliation Of Shares Used In Basic E P S Calculation To Shares Used In Diluted E P S Calculation [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ScheduleOfReconciliationOfSharesUsedInBasicEPSCalculationToSharesUsedInDilutedEPSCalculationTableTextBlock_lbl" xml:lang="en-US">Schedule Of Reconciliation Of Shares Used In Basic EPS Calculation To Shares Used In Diluted EPS Calculation</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfOtherOwnershipInterestsTextBlock" xlink:label="us-gaap_ScheduleOfOtherOwnershipInterestsTextBlock" />
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfOtherOwnershipInterestsTextBlock_lbl" xml:lang="en-US">Schedule of Other Ownership Interests [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ScheduleOfOtherOwnershipInterestsTextBlock_lbl" xml:lang="en-US">Changes Of Noncontrolling Interests In Subsidiaries</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock" xlink:label="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock" xlink:to="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_lbl" xml:lang="en-US">Schedule of Segment Reporting Information, by Segment [Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_lbl" xml:lang="en-US">Schedule Of Segment Reporting Information, By Segment</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock" xlink:label="us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock" xlink:to="us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock_lbl" xml:lang="en-US">Schedule of Quarterly Financial Information [Table Text Block]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock_lbl" xml:lang="en-US">Condensed Quarterly Financial Information</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfRealEstatePropertiesTable" xlink:label="us-gaap_ScheduleOfRealEstatePropertiesTable" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfRealEstatePropertiesTable" xlink:to="us-gaap_ScheduleOfRealEstatePropertiesTable_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfRealEstatePropertiesTable_lbl" xml:lang="en-US">Schedule of Real Estate Properties [Table]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_RealEstatePropertyByCategoriesAxis" xlink:label="cli_RealEstatePropertyByCategoriesAxis" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_RealEstatePropertyByCategoriesAxis" xlink:to="cli_RealEstatePropertyByCategoriesAxis_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_RealEstatePropertyByCategoriesAxis_lbl" xml:lang="en-US">Real Estate Property by Categories [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_RealEstatePropertyByCategoriesAxis_lbl" xml:lang="en-US">Real Estate Property by Categories [Axis]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_RealEstatePropertyByCategoriesDomain" xlink:label="cli_RealEstatePropertyByCategoriesDomain" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_RealEstatePropertyByCategoriesDomain" xlink:to="cli_RealEstatePropertyByCategoriesDomain_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_RealEstatePropertyByCategoriesDomain_lbl" xml:lang="en-US">Real Estate Property by Categories [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_RealEstatePropertyByCategoriesDomain_lbl" xml:lang="en-US">Real Estate Property By Categories [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_RealEstatePropertyByCategoriesDomain_lbl" xml:lang="en-US">Real Estate Property by Categories [Domain]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OfficeAndOfficeFlexBuildingsMember" xlink:label="cli_OfficeAndOfficeFlexBuildingsMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OfficeAndOfficeFlexBuildingsMember" xlink:to="cli_OfficeAndOfficeFlexBuildingsMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OfficeAndOfficeFlexBuildingsMember_lbl" xml:lang="en-US">Office And Office Flex Buildings [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OfficeAndOfficeFlexBuildingsMember_lbl" xml:lang="en-US">Office And Office Flex Buildings [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OfficeAndOfficeFlexBuildingsMember_lbl" xml:lang="en-US">Office And Office/Flex Buildings [Member]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BuildingMember" xlink:label="us-gaap_BuildingMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BuildingMember" xlink:to="us-gaap_BuildingMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BuildingMember_lbl" xml:lang="en-US">Building [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_BuildingMember_lbl" xml:lang="en-US">Office Buildings [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_IndustrialAndWarehouseFacilitiesMember" xlink:label="cli_IndustrialAndWarehouseFacilitiesMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_IndustrialAndWarehouseFacilitiesMember" xlink:to="cli_IndustrialAndWarehouseFacilitiesMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_IndustrialAndWarehouseFacilitiesMember_lbl" xml:lang="en-US">Industrial and Warehouse Facilities [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_IndustrialAndWarehouseFacilitiesMember_lbl" xml:lang="en-US">Industrial And Warehouse Facilities [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_IndustrialAndWarehouseFacilitiesMember_lbl" xml:lang="en-US">Industrial/Warehouse Facilities [Member]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RetailSiteMember" xlink:label="us-gaap_RetailSiteMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RetailSiteMember" xlink:to="us-gaap_RetailSiteMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RetailSiteMember_lbl" xml:lang="en-US">Retail Site [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RetailSiteMember_lbl" xml:lang="en-US">Retail [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_HotelsMember" xlink:label="cli_HotelsMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_HotelsMember" xlink:to="cli_HotelsMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_HotelsMember_lbl" xml:lang="en-US">Hotels [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_HotelsMember_lbl" xml:lang="en-US">Hotels [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_HotelsMember_lbl" xml:lang="en-US">Hotel [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_LandSubjectToLeaseMember" xlink:label="cli_LandSubjectToLeaseMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_LandSubjectToLeaseMember" xlink:to="cli_LandSubjectToLeaseMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_LandSubjectToLeaseMember_lbl" xml:lang="en-US">Land Subject to Lease [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_LandSubjectToLeaseMember_lbl" xml:lang="en-US">Land Subject To Lease [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_LandSubjectToLeaseMember_lbl" xml:lang="en-US">Land Leased [Member]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RealEstatePropertiesLineItems" xlink:label="us-gaap_RealEstatePropertiesLineItems" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RealEstatePropertiesLineItems" xlink:to="us-gaap_RealEstatePropertiesLineItems_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RealEstatePropertiesLineItems_lbl" xml:lang="en-US">Real Estate Properties [Line Items]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_RealEstatePropertyOwnedAndInvestmentInterest" xlink:label="cli_RealEstatePropertyOwnedAndInvestmentInterest" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_RealEstatePropertyOwnedAndInvestmentInterest" xlink:to="cli_RealEstatePropertyOwnedAndInvestmentInterest_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_RealEstatePropertyOwnedAndInvestmentInterest_lbl" xml:lang="en-US">Real Estate Property Owned and Investment Interest</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_RealEstatePropertyOwnedAndInvestmentInterest_lbl" xml:lang="en-US">Real Estate Property Owned and Investment Interest</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_RealEstatePropertyOwnedAndInvestmentInterest_lbl" xml:lang="en-US">Number of properties owned or investment interests</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_RealEstatePropertyOwnedAndInvestmentInterestArea" xlink:label="cli_RealEstatePropertyOwnedAndInvestmentInterestArea" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_RealEstatePropertyOwnedAndInvestmentInterestArea" xlink:to="cli_RealEstatePropertyOwnedAndInvestmentInterestArea_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_RealEstatePropertyOwnedAndInvestmentInterestArea_lbl" xml:lang="en-US">Real Estate Property Owned and Investment Interest, Area</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_RealEstatePropertyOwnedAndInvestmentInterestArea_lbl" xml:lang="en-US">Real Estate Property Owned and Investment Interest, Area</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_RealEstatePropertyOwnedAndInvestmentInterestArea_lbl" xml:lang="en-US">Aggregate square feet of the property owned or investment interest</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_RealEstatePropertyOwnedOrInvestmentInterestNumberOfLocation" xlink:label="cli_RealEstatePropertyOwnedOrInvestmentInterestNumberOfLocation" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_RealEstatePropertyOwnedOrInvestmentInterestNumberOfLocation" xlink:to="cli_RealEstatePropertyOwnedOrInvestmentInterestNumberOfLocation_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_RealEstatePropertyOwnedOrInvestmentInterestNumberOfLocation_lbl" xml:lang="en-US">Real Estate Property Owned or Investment Interest, Number of Location</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_RealEstatePropertyOwnedOrInvestmentInterestNumberOfLocation_lbl" xml:lang="en-US">Real Estate Property Owned or Investment Interest, Number of Location</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="cli_RealEstatePropertyOwnedOrInvestmentInterestNumberOfLocation_lbl" xml:lang="en-US">Number of states where properties are located</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ConstructionInProgressGross" xlink:label="us-gaap_ConstructionInProgressGross" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConstructionInProgressGross" xlink:to="us-gaap_ConstructionInProgressGross_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ConstructionInProgressGross_lbl" xml:lang="en-US">Construction in Progress, Gross</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ConstructionInProgressGross_lbl" xml:lang="en-US">Rental property in-progress</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AmortizationOfFinancingCosts" xlink:label="us-gaap_AmortizationOfFinancingCosts" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AmortizationOfFinancingCosts" xlink:to="us-gaap_AmortizationOfFinancingCosts_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AmortizationOfFinancingCosts_lbl" xml:lang="en-US">Amortization of Financing Costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AmortizationOfFinancingCosts_lbl" xml:lang="en-US">Amortization of deferred financing costs</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AmortizationOfDeferredLeasingFees" xlink:label="us-gaap_AmortizationOfDeferredLeasingFees" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AmortizationOfDeferredLeasingFees" xlink:to="us-gaap_AmortizationOfDeferredLeasingFees_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AmortizationOfDeferredLeasingFees_lbl" xml:lang="en-US">Amortization of Deferred Leasing Fees</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AmortizationOfDeferredLeasingFees_lbl" xml:lang="en-US">Deferred leasing costs</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_PercentageRequirementOfTaxableIncomeToDistributeToShareholders" xlink:label="cli_PercentageRequirementOfTaxableIncomeToDistributeToShareholders" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_PercentageRequirementOfTaxableIncomeToDistributeToShareholders" xlink:to="cli_PercentageRequirementOfTaxableIncomeToDistributeToShareholders_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_PercentageRequirementOfTaxableIncomeToDistributeToShareholders_lbl" xml:lang="en-US">Minimum percentage of taxable income required to be distributed to shareholders.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_PercentageRequirementOfTaxableIncomeToDistributeToShareholders_lbl" xml:lang="en-US">Percentage Requirement Of Taxable Income To Distribute To Shareholders</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_PercentageRequirementOfTaxableIncomeToDistributeToShareholders_lbl" xml:lang="en-US">Minimum percentage of REIT taxable income distributed to shareholders</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_CommonUnitsOutstanding" xlink:label="cli_CommonUnitsOutstanding" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_CommonUnitsOutstanding" xlink:to="cli_CommonUnitsOutstanding_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_CommonUnitsOutstanding_lbl" xml:lang="en-US">The number of common units outstanding.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_CommonUnitsOutstanding_lbl" xml:lang="en-US">Common Units Outstanding</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="cli_CommonUnitsOutstanding_lbl" xml:lang="en-US">Balance, Ending</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="cli_CommonUnitsOutstanding_lbl" xml:lang="en-US">Balance, Beginning</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_CommonUnitsOutstanding_lbl" xml:lang="en-US">Common units outstanding</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PreferredStockDividendsPerShareDeclared" xlink:label="us-gaap_PreferredStockDividendsPerShareDeclared" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockDividendsPerShareDeclared" xlink:to="us-gaap_PreferredStockDividendsPerShareDeclared_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockDividendsPerShareDeclared_lbl" xml:lang="en-US">Preferred Stock Dividends Per Share Declared</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PreferredStockDividendsPerShareDeclared_lbl" xml:lang="en-US">Preferred stock dividends per share declared</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_CommonUnitDistributionsPerUnitDeclared" xlink:label="cli_CommonUnitDistributionsPerUnitDeclared" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_CommonUnitDistributionsPerUnitDeclared" xlink:to="cli_CommonUnitDistributionsPerUnitDeclared_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_CommonUnitDistributionsPerUnitDeclared_lbl" xml:lang="en-US">Common Unit Distributions Per Unit Declared</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_CommonUnitDistributionsPerUnitDeclared_lbl" xml:lang="en-US">Common Unit Distributions Per Unit Declared</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_CommonUnitDistributionsPerUnitDeclared_lbl" xml:lang="en-US">Common unit distributions per share</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CommonStockDividendsPerShareCashPaid" xlink:label="us-gaap_CommonStockDividendsPerShareCashPaid" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockDividendsPerShareCashPaid" xlink:to="us-gaap_CommonStockDividendsPerShareCashPaid_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockDividendsPerShareCashPaid_lbl" xml:lang="en-US">Common Stock, Dividends, Per Share, Cash Paid</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_CommonStockDividendsPerShareCashPaid_lbl" xml:lang="en-US">Dividend paid per common share</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_CommonStockDividendsPerSharePaidPercentRepresentingOrdinaryIncome" xlink:label="cli_CommonStockDividendsPerSharePaidPercentRepresentingOrdinaryIncome" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_CommonStockDividendsPerSharePaidPercentRepresentingOrdinaryIncome" xlink:to="cli_CommonStockDividendsPerSharePaidPercentRepresentingOrdinaryIncome_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_CommonStockDividendsPerSharePaidPercentRepresentingOrdinaryIncome_lbl" xml:lang="en-US">Common Stock Dividends Per Share Paid, Percent Representing Ordinary Income</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_CommonStockDividendsPerSharePaidPercentRepresentingOrdinaryIncome_lbl" xml:lang="en-US">Common Stock Dividends Per Share Paid, Percent Representing Ordinary Income</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_CommonStockDividendsPerSharePaidPercentRepresentingOrdinaryIncome_lbl" xml:lang="en-US">Dividends paid, percent representing ordinary income</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_CommonStockDividendsPerSharePaidPercentRepresentingReturnOfCapitalToStockholders" xlink:label="cli_CommonStockDividendsPerSharePaidPercentRepresentingReturnOfCapitalToStockholders" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_CommonStockDividendsPerSharePaidPercentRepresentingReturnOfCapitalToStockholders" xlink:to="cli_CommonStockDividendsPerSharePaidPercentRepresentingReturnOfCapitalToStockholders_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_CommonStockDividendsPerSharePaidPercentRepresentingReturnOfCapitalToStockholders_lbl" xml:lang="en-US">Common Stock Dividends Per Share Paid Percent Representing Return Of Capital To Stockholders</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_CommonStockDividendsPerSharePaidPercentRepresentingReturnOfCapitalToStockholders_lbl" xml:lang="en-US">Common Stock Dividends Per Share Paid Percent Representing Return Of Capital To Stockholders</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_CommonStockDividendsPerSharePaidPercentRepresentingReturnOfCapitalToStockholders_lbl" xml:lang="en-US">Dividends paid, percent representing return of capital to shareholders</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RestrictedStockExpense" xlink:label="us-gaap_RestrictedStockExpense" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestrictedStockExpense" xlink:to="us-gaap_RestrictedStockExpense_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RestrictedStockExpense_lbl" xml:lang="en-US">Restricted Stock Expense</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RestrictedStockExpense_lbl" xml:lang="en-US">Restricted stock expense</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:label="us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:to="us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_lbl" xml:lang="en-US">Schedule of Property, Plant and Equipment [Table]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:label="us-gaap_PropertyPlantAndEquipmentByTypeAxis" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:to="us-gaap_PropertyPlantAndEquipmentByTypeAxis_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PropertyPlantAndEquipmentByTypeAxis_lbl" xml:lang="en-US">Property, Plant and Equipment by Type [Axis]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="us-gaap_PropertyPlantAndEquipmentTypeDomain" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:to="us-gaap_PropertyPlantAndEquipmentTypeDomain_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PropertyPlantAndEquipmentTypeDomain_lbl" xml:lang="en-US">Property Plant And Equipment Type [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PropertyPlantAndEquipmentTypeDomain_lbl" xml:lang="en-US">Property, Plant and Equipment, Type [Domain]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BuildingAndBuildingImprovementsMember" xlink:label="us-gaap_BuildingAndBuildingImprovementsMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BuildingAndBuildingImprovementsMember" xlink:to="us-gaap_BuildingAndBuildingImprovementsMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BuildingAndBuildingImprovementsMember_lbl" xml:lang="en-US">Building And Building Improvements [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_BuildingAndBuildingImprovementsMember_lbl" xml:lang="en-US">Buildings And Improvements [Member]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FurnitureAndFixturesMember" xlink:label="us-gaap_FurnitureAndFixturesMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FurnitureAndFixturesMember" xlink:to="us-gaap_FurnitureAndFixturesMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FurnitureAndFixturesMember_lbl" xml:lang="en-US">Furniture And Fixtures [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_FurnitureAndFixturesMember_lbl" xml:lang="en-US">Furniture, Fixtures And Equipment [Member]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems" xlink:label="us-gaap_PropertyPlantAndEquipmentLineItems" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentLineItems" xlink:to="us-gaap_PropertyPlantAndEquipmentLineItems_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PropertyPlantAndEquipmentLineItems_lbl" xml:lang="en-US">Property, Plant and Equipment [Line Items]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PropertyPlantAndEquipmentUsefulLifeMinimum" xlink:label="us-gaap_PropertyPlantAndEquipmentUsefulLifeMinimum" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentUsefulLifeMinimum" xlink:to="us-gaap_PropertyPlantAndEquipmentUsefulLifeMinimum_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PropertyPlantAndEquipmentUsefulLifeMinimum_lbl" xml:lang="en-US">Property, Plant and Equipment, Useful Life, Minimum</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PropertyPlantAndEquipmentUsefulLifeMinimum_lbl" xml:lang="en-US">Estimated useful lives of assets, minimum (in years)</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PropertyPlantAndEquipmentUsefulLifeMaximum" xlink:label="us-gaap_PropertyPlantAndEquipmentUsefulLifeMaximum" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PropertyPlantAndEquipmentUsefulLifeMaximum" xlink:to="us-gaap_PropertyPlantAndEquipmentUsefulLifeMaximum_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PropertyPlantAndEquipmentUsefulLifeMaximum_lbl" xml:lang="en-US">Property, Plant and Equipment, Useful Life, Maximum</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PropertyPlantAndEquipmentUsefulLifeMaximum_lbl" xml:lang="en-US">Estimated useful lives of assets, maximum (in years)</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RealEstatePropertiesAxis" xlink:label="us-gaap_RealEstatePropertiesAxis" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RealEstatePropertiesAxis" xlink:to="us-gaap_RealEstatePropertiesAxis_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RealEstatePropertiesAxis_lbl" xml:lang="en-US">Real Estate Properties [Axis]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RealEstatePropertiesDomain" xlink:label="us-gaap_RealEstatePropertiesDomain" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RealEstatePropertiesDomain" xlink:to="us-gaap_RealEstatePropertiesDomain_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RealEstatePropertiesDomain_lbl" xml:lang="en-US">Real Estate Properties [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RealEstatePropertiesDomain_lbl" xml:lang="en-US">Real Estate Properties [Domain]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FiftyFiveCorporateMember" xlink:label="cli_FiftyFiveCorporateMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FiftyFiveCorporateMember" xlink:to="cli_FiftyFiveCorporateMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FiftyFiveCorporateMember_lbl" xml:lang="en-US">Fifty Five Corporate [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FiftyFiveCorporateMember_lbl" xml:lang="en-US">Fifty Five Corporate [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FiftyFiveCorporateMember_lbl" xml:lang="en-US">55 Corporate Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_AreaOfPropertyInSquareFoot" xlink:label="cli_AreaOfPropertyInSquareFoot" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_AreaOfPropertyInSquareFoot" xlink:to="cli_AreaOfPropertyInSquareFoot_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_AreaOfPropertyInSquareFoot_lbl" xml:lang="en-US">Area of Property in Square foot</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_AreaOfPropertyInSquareFoot_lbl" xml:lang="en-US">Area of Property in Square foot</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_AreaOfPropertyInSquareFoot_lbl" xml:lang="en-US">Area of office property</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="cli_AreaOfPropertyInSquareFoot_lbl" xml:lang="en-US">Area under development</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RealEstateInvestments" xlink:label="us-gaap_RealEstateInvestments" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RealEstateInvestments" xlink:to="us-gaap_RealEstateInvestments_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RealEstateInvestments_lbl" xml:lang="en-US">Real Estate Investments</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_RealEstateInvestments_lbl" xml:lang="en-US">Real Estate Investments, Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_RealEstateInvestments_lbl" xml:lang="en-US">Investment by Company</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsTable" xlink:label="us-gaap_ScheduleOfEquityMethodInvestmentsTable" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfEquityMethodInvestmentsTable" xlink:to="us-gaap_ScheduleOfEquityMethodInvestmentsTable_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfEquityMethodInvestmentsTable_lbl" xml:lang="en-US">Schedule of Equity Method Investments [Table]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:label="us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:to="us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_lbl" xml:lang="en-US">Schedule of Equity Method Investment, Equity Method Investee, Name [Axis]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityMethodInvesteeNameDomain" xlink:label="us-gaap_EquityMethodInvesteeNameDomain" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EquityMethodInvesteeNameDomain" xlink:to="us-gaap_EquityMethodInvesteeNameDomain_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EquityMethodInvesteeNameDomain_lbl" xml:lang="en-US">Equity Method Investee Name [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_EquityMethodInvesteeNameDomain_lbl" xml:lang="en-US">Equity Method Investee, Name [Domain]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_PlazaEightAndNineAssociatesMember" xlink:label="cli_PlazaEightAndNineAssociatesMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_PlazaEightAndNineAssociatesMember" xlink:to="cli_PlazaEightAndNineAssociatesMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_PlazaEightAndNineAssociatesMember_lbl" xml:lang="en-US">Plaza Eight and Nine Associates [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_PlazaEightAndNineAssociatesMember_lbl" xml:lang="en-US">Plaza Eight And Nine Associates [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_PlazaEightAndNineAssociatesMember_lbl" xml:lang="en-US">Plaza VIII &amp; IX Associates [Member]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsLineItems" xlink:label="us-gaap_ScheduleOfEquityMethodInvestmentsLineItems" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfEquityMethodInvestmentsLineItems" xlink:to="us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_lbl" xml:lang="en-US">Schedule of Equity Method Investments [Line Items]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityMethodInvestmentOwnershipPercentage" xlink:label="us-gaap_EquityMethodInvestmentOwnershipPercentage" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EquityMethodInvestmentOwnershipPercentage" xlink:to="us-gaap_EquityMethodInvestmentOwnershipPercentage_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EquityMethodInvestmentOwnershipPercentage_lbl" xml:lang="en-US">Equity Method Investment, Ownership Percentage</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_EquityMethodInvestmentOwnershipPercentage_lbl" xml:lang="en-US">Percentage of interest in venture</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_HarborsideSouthPierMember" xlink:label="cli_HarborsideSouthPierMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_HarborsideSouthPierMember" xlink:to="cli_HarborsideSouthPierMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_HarborsideSouthPierMember_lbl" xml:lang="en-US">Harborside South Pier [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_HarborsideSouthPierMember_lbl" xml:lang="en-US">Harborside South Pier [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_HarborsideSouthPierMember_lbl" xml:lang="en-US">Harborside South Pier [Member]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NumberOfUnitsInRealEstateProperty" xlink:label="us-gaap_NumberOfUnitsInRealEstateProperty" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NumberOfUnitsInRealEstateProperty" xlink:to="us-gaap_NumberOfUnitsInRealEstateProperty_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NumberOfUnitsInRealEstateProperty_lbl" xml:lang="en-US">Number of Units in Real Estate Property</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NumberOfUnitsInRealEstateProperty_lbl" xml:lang="en-US">Number of apartment units in each tower</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_NumberOfUnitsInRealEstateProperty_lbl" xml:lang="en-US">Number of hotel rooms</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages" xlink:label="us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages" xlink:to="us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages_lbl" xml:lang="en-US">Mortgage Loans on Real Estate, Carrying Amount of Mortgages</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_MortgageLoansOnRealEstateCarryingAmountOfMortgages_lbl" xml:lang="en-US">Mortgage loans, carrying amount</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:to="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl" xml:lang="en-US">Debt Instrument, Interest Rate, Stated Percentage</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl" xml:lang="en-US">Interest rate</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl" xml:lang="en-US">Interest rate of the Senior Unsecured Notes</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_MortgageLoanMaturityPeriod" xlink:label="cli_MortgageLoanMaturityPeriod" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_MortgageLoanMaturityPeriod" xlink:to="cli_MortgageLoanMaturityPeriod_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_MortgageLoanMaturityPeriod_lbl" xml:lang="en-US">Mortgage Loan Maturity Period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_MortgageLoanMaturityPeriod_lbl" xml:lang="en-US">Mortgage Loan Maturity Period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_MortgageLoanMaturityPeriod_lbl" xml:lang="en-US">Mortgage loan, maturity date</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentInterestRateEffectivePercentageRateRangeMinimum" xlink:label="us-gaap_DebtInstrumentInterestRateEffectivePercentageRateRangeMinimum" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentInterestRateEffectivePercentageRateRangeMinimum" xlink:to="us-gaap_DebtInstrumentInterestRateEffectivePercentageRateRangeMinimum_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentInterestRateEffectivePercentageRateRangeMinimum_lbl" xml:lang="en-US">Debt Instrument, Interest Rate, Effective Percentage Rate Range, Minimum</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtInstrumentInterestRateEffectivePercentageRateRangeMinimum_lbl" xml:lang="en-US">Bears interest at fixed rate range, minimum</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DebtInstrumentInterestRateEffectivePercentageRateRangeMinimum_lbl" xml:lang="en-US">Minimum interest rate for the loan after the reset period</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentInterestRateEffectivePercentageRateRangeMaximum" xlink:label="us-gaap_DebtInstrumentInterestRateEffectivePercentageRateRangeMaximum" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentInterestRateEffectivePercentageRateRangeMaximum" xlink:to="us-gaap_DebtInstrumentInterestRateEffectivePercentageRateRangeMaximum_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentInterestRateEffectivePercentageRateRangeMaximum_lbl" xml:lang="en-US">Debt Instrument, Interest Rate, Effective Percentage Rate Range, Maximum</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtInstrumentInterestRateEffectivePercentageRateRangeMaximum_lbl" xml:lang="en-US">Bears interest at fixed rate range, maximum</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_LineOfCreditFacilityInSupportOfDebtInstrumentFairValueOfAmountOutstanding" xlink:label="cli_LineOfCreditFacilityInSupportOfDebtInstrumentFairValueOfAmountOutstanding" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_LineOfCreditFacilityInSupportOfDebtInstrumentFairValueOfAmountOutstanding" xlink:to="cli_LineOfCreditFacilityInSupportOfDebtInstrumentFairValueOfAmountOutstanding_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_LineOfCreditFacilityInSupportOfDebtInstrumentFairValueOfAmountOutstanding_lbl" xml:lang="en-US">Fair value of the amount outstanding under the credit facility.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_LineOfCreditFacilityInSupportOfDebtInstrumentFairValueOfAmountOutstanding_lbl" xml:lang="en-US">Line Of Credit Facility In Support Of Debt Instrument Fair Value Of Amount Outstanding</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_LineOfCreditFacilityInSupportOfDebtInstrumentFairValueOfAmountOutstanding_lbl" xml:lang="en-US">Letter of credit</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_LoanCarryingAmount" xlink:label="cli_LoanCarryingAmount" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_LoanCarryingAmount" xlink:to="cli_LoanCarryingAmount_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_LoanCarryingAmount_lbl" xml:lang="en-US">Loan Carrying Amount</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_LoanCarryingAmount_lbl" xml:lang="en-US">Loan Carrying Amount</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_LoanCarryingAmount_lbl" xml:lang="en-US">Book value of company's long-term debt</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_LoanMaturityDate" xlink:label="cli_LoanMaturityDate" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_LoanMaturityDate" xlink:to="cli_LoanMaturityDate_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_LoanMaturityDate_lbl" xml:lang="en-US">Loan Maturity Date</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_LoanMaturityDate_lbl" xml:lang="en-US">Loan maturity date</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_LineOfCreditFacilityByCategoryAxis" xlink:label="cli_LineOfCreditFacilityByCategoryAxis" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_LineOfCreditFacilityByCategoryAxis" xlink:to="cli_LineOfCreditFacilityByCategoryAxis_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_LineOfCreditFacilityByCategoryAxis_lbl" xml:lang="en-US">Line of Credit Facility, by Category [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_LineOfCreditFacilityByCategoryAxis_lbl" xml:lang="en-US">Line of Credit Facility, by Category [Axis]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_LineOfCreditFacilityByCategoryDomain" xlink:label="cli_LineOfCreditFacilityByCategoryDomain" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_LineOfCreditFacilityByCategoryDomain" xlink:to="cli_LineOfCreditFacilityByCategoryDomain_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_LineOfCreditFacilityByCategoryDomain_lbl" xml:lang="en-US">Line of Credit Facility, by Category [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_LineOfCreditFacilityByCategoryDomain_lbl" xml:lang="en-US">Line Of Credit Facility By Category [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_LineOfCreditFacilityByCategoryDomain_lbl" xml:lang="en-US">Line of Credit Facility, by Category [Domain]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_PreviousMortgageLoanMember" xlink:label="cli_PreviousMortgageLoanMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_PreviousMortgageLoanMember" xlink:to="cli_PreviousMortgageLoanMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_PreviousMortgageLoanMember_lbl" xml:lang="en-US">Previous mortgage loan [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_PreviousMortgageLoanMember_lbl" xml:lang="en-US">Previous Mortgage Loan [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_PreviousMortgageLoanMember_lbl" xml:lang="en-US">Previous Mortgage Loan [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_RedBankCorporatePlazaMember" xlink:label="cli_RedBankCorporatePlazaMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_RedBankCorporatePlazaMember" xlink:to="cli_RedBankCorporatePlazaMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_RedBankCorporatePlazaMember_lbl" xml:lang="en-US">Red Bank Corporate Plaza [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_RedBankCorporatePlazaMember_lbl" xml:lang="en-US">Red Bank Corporate Plaza [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_RedBankCorporatePlazaMember_lbl" xml:lang="en-US">Red Bank Corporate Plaza [Member]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MortgageLoansOnRealEstateNewMortgageLoans" xlink:label="us-gaap_MortgageLoansOnRealEstateNewMortgageLoans" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MortgageLoansOnRealEstateNewMortgageLoans" xlink:to="us-gaap_MortgageLoansOnRealEstateNewMortgageLoans_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MortgageLoansOnRealEstateNewMortgageLoans_lbl" xml:lang="en-US">Mortgage Loans on Real Estate, New Mortgage Loans</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_MortgageLoansOnRealEstateNewMortgageLoans_lbl" xml:lang="en-US">Mortgage finance on property obtained</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_MortgageLoansOnRealEstateNewMortgageLoans_lbl" xml:lang="en-US">New mortgage loan</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtPercentageBearingFixedInterestRate" xlink:label="us-gaap_LongTermDebtPercentageBearingFixedInterestRate" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtPercentageBearingFixedInterestRate" xlink:to="us-gaap_LongTermDebtPercentageBearingFixedInterestRate_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongTermDebtPercentageBearingFixedInterestRate_lbl" xml:lang="en-US">Long-term Debt, Percentage Bearing Fixed Interest Rate</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LongTermDebtPercentageBearingFixedInterestRate_lbl" xml:lang="en-US">Fixed interest rate</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_LongTermDebtPercentageBearingFixedInterestRate_lbl" xml:lang="en-US">Weighted average interest rate of the indebtedness</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RepaymentsOfFirstMortgageBond" xlink:label="us-gaap_RepaymentsOfFirstMortgageBond" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RepaymentsOfFirstMortgageBond" xlink:to="us-gaap_RepaymentsOfFirstMortgageBond_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RepaymentsOfFirstMortgageBond_lbl" xml:lang="en-US">Repayments of First Mortgage Bond</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RepaymentsOfFirstMortgageBond_lbl" xml:lang="en-US">Repayment of mortgage loan</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_SpreadOverLibor" xlink:label="cli_SpreadOverLibor" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_SpreadOverLibor" xlink:to="cli_SpreadOverLibor_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_SpreadOverLibor_lbl" xml:lang="en-US">Spread Over Libor</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_SpreadOverLibor_lbl" xml:lang="en-US">Spread over LIBOR</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_SpreadOverLibor_lbl" xml:lang="en-US">Spread over LIBOR</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_LIBORInterestRate" xlink:label="cli_LIBORInterestRate" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_LIBORInterestRate" xlink:to="cli_LIBORInterestRate_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_LIBORInterestRate_lbl" xml:lang="en-US">LIBOR Interest Rate</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_LIBORInterestRate_lbl" xml:lang="en-US">L I B O R Interest Rate</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_LIBORInterestRate_lbl" xml:lang="en-US">LIBOR interest rate</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_PercentageOfLoanPrincipalSwapped" xlink:label="cli_PercentageOfLoanPrincipalSwapped" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_PercentageOfLoanPrincipalSwapped" xlink:to="cli_PercentageOfLoanPrincipalSwapped_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_PercentageOfLoanPrincipalSwapped_lbl" xml:lang="en-US">Percentage of loan principal swapped.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_PercentageOfLoanPrincipalSwapped_lbl" xml:lang="en-US">Percentage Of Loan Principal Swapped</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_PercentageOfLoanPrincipalSwapped_lbl" xml:lang="en-US">Percentage of loan principal swapped</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ManagementLeasingAndOtherServicesFees" xlink:label="cli_ManagementLeasingAndOtherServicesFees" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ManagementLeasingAndOtherServicesFees" xlink:to="cli_ManagementLeasingAndOtherServicesFees_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ManagementLeasingAndOtherServicesFees_lbl" xml:lang="en-US">Management Leasing And Other Services Fees.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ManagementLeasingAndOtherServicesFees_lbl" xml:lang="en-US">Management leasing and other services fees</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ManagementLeasingAndOtherServicesFees_lbl" xml:lang="en-US">Management, leasing and other services fees</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/invest/2011/invest-2011-01-31.xsd#invest_InvestmentGeographicRegionAxis" xlink:label="invest_InvestmentGeographicRegionAxis" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="invest_InvestmentGeographicRegionAxis" xlink:to="invest_InvestmentGeographicRegionAxis_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="invest_InvestmentGeographicRegionAxis_lbl" xml:lang="en-US">Investment Geographic Region [Axis]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/stpr/2011/stpr-2011-01-31.xsd#stpr_AllStatesAndProvincesDomain" xlink:label="stpr_AllStatesAndProvincesDomain" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="stpr_AllStatesAndProvincesDomain" xlink:to="stpr_AllStatesAndProvincesDomain_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="stpr_AllStatesAndProvincesDomain_lbl" xml:lang="en-US">All States And Provinces [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="stpr_AllStatesAndProvincesDomain_lbl" xml:lang="en-US">All States and Provinces [Domain]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/stpr/2011/stpr-2011-01-31.xsd#stpr_NJ" xlink:label="stpr_NJ" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="stpr_NJ" xlink:to="stpr_NJ_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="stpr_NJ_lbl" xml:lang="en-US">N [J]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="stpr_NJ_lbl" xml:lang="en-US">New Jersey [Member]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/stpr/2011/stpr-2011-01-31.xsd#stpr_MI" xlink:label="stpr_MI" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="stpr_MI" xlink:to="stpr_MI_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="stpr_MI_lbl" xml:lang="en-US">M [I]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="stpr_MI_lbl" xml:lang="en-US">Michigan [Member]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_lbl" xml:lang="en-US">Related Party Transactions, by Related Party [Axis]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="us-gaap_RelatedPartyDomain_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RelatedPartyDomain_lbl" xml:lang="en-US">Related Party [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RelatedPartyDomain_lbl" xml:lang="en-US">Related Party [Domain]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OperatingPartnershipLPMember" xlink:label="cli_OperatingPartnershipLPMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OperatingPartnershipLPMember" xlink:to="cli_OperatingPartnershipLPMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OperatingPartnershipLPMember_lbl" xml:lang="en-US">Operating Partnership, L.P. [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OperatingPartnershipLPMember_lbl" xml:lang="en-US">Operating Partnership L P [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OperatingPartnershipLPMember_lbl" xml:lang="en-US">OPLP [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_GramercyAgreementMember" xlink:label="cli_GramercyAgreementMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_GramercyAgreementMember" xlink:to="cli_GramercyAgreementMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_GramercyAgreementMember_lbl" xml:lang="en-US">Gramercy Agreement [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_GramercyAgreementMember_lbl" xml:lang="en-US">Gramercy Agreement [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_GramercyAgreementMember_lbl" xml:lang="en-US">Gramercy Agreement [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_MackGreenMember" xlink:label="cli_MackGreenMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_MackGreenMember" xlink:to="cli_MackGreenMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_MackGreenMember_lbl" xml:lang="en-US">Mack Green [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_MackGreenMember_lbl" xml:lang="en-US">Mack Green [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_MackGreenMember_lbl" xml:lang="en-US">Mack-Green [Member]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NumberOfRealEstateProperties" xlink:label="us-gaap_NumberOfRealEstateProperties" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NumberOfRealEstateProperties" xlink:to="us-gaap_NumberOfRealEstateProperties_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NumberOfRealEstateProperties_lbl" xml:lang="en-US">Number Of Real Estate Properties</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_NumberOfRealEstateProperties_lbl" xml:lang="en-US">Number of properties</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_NumberOfRealEstateProperties_lbl" xml:lang="en-US"># of Bldgs.</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_AreaOfDisposedPropertyInSquareFoot" xlink:label="cli_AreaOfDisposedPropertyInSquareFoot" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_AreaOfDisposedPropertyInSquareFoot" xlink:to="cli_AreaOfDisposedPropertyInSquareFoot_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_AreaOfDisposedPropertyInSquareFoot_lbl" xml:lang="en-US">Area of Disposed Property in Square Foot</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_AreaOfDisposedPropertyInSquareFoot_lbl" xml:lang="en-US">Area of Disposed Property in Square Foot</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_AreaOfDisposedPropertyInSquareFoot_lbl" xml:lang="en-US">Area of office property sold</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MortgageLoansOnRealEstateMaximumInterestRateInRange" xlink:label="us-gaap_MortgageLoansOnRealEstateMaximumInterestRateInRange" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MortgageLoansOnRealEstateMaximumInterestRateInRange" xlink:to="us-gaap_MortgageLoansOnRealEstateMaximumInterestRateInRange_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MortgageLoansOnRealEstateMaximumInterestRateInRange_lbl" xml:lang="en-US">Mortgage Loans on Real Estate, Maximum Interest Rate in Range</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_MortgageLoansOnRealEstateMaximumInterestRateInRange_lbl" xml:lang="en-US">Interest rate cap</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_VentureSaleOfRealEstate" xlink:label="cli_VentureSaleOfRealEstate" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_VentureSaleOfRealEstate" xlink:to="cli_VentureSaleOfRealEstate_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_VentureSaleOfRealEstate_lbl" xml:lang="en-US">Revenue recognized by the venture from the sale of property.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_VentureSaleOfRealEstate_lbl" xml:lang="en-US">Venture Sale Of Real Estate</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_VentureSaleOfRealEstate_lbl" xml:lang="en-US">Venture sale of real estate</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ServiceCosts" xlink:label="cli_ServiceCosts" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ServiceCosts" xlink:to="cli_ServiceCosts_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ServiceCosts_lbl" xml:lang="en-US">The aggregate costs related to delivering management, leasing, and other services during the reporting period.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ServiceCosts_lbl" xml:lang="en-US">Service costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ServiceCosts_lbl" xml:lang="en-US">Service costs</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_AcquisitionCost" xlink:label="cli_AcquisitionCost" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_AcquisitionCost" xlink:to="cli_AcquisitionCost_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_AcquisitionCost_lbl" xml:lang="en-US">Acquisition Cost</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_AcquisitionCost_lbl" xml:lang="en-US">Acquisition Cost</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_AcquisitionCost_lbl" xml:lang="en-US">Acquisition cost</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_MortgageLoansOnRealEstateBearingWeightedAverageFixedInterestRate" xlink:label="cli_MortgageLoansOnRealEstateBearingWeightedAverageFixedInterestRate" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_MortgageLoansOnRealEstateBearingWeightedAverageFixedInterestRate" xlink:to="cli_MortgageLoansOnRealEstateBearingWeightedAverageFixedInterestRate_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_MortgageLoansOnRealEstateBearingWeightedAverageFixedInterestRate_lbl" xml:lang="en-US">Mortgage Loans On Real Estate Bearing Weighted Average Fixed Interest Rate.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_MortgageLoansOnRealEstateBearingWeightedAverageFixedInterestRate_lbl" xml:lang="en-US">Mortgage Loans On Real Estate Bearing Weighted Average Fixed Interest Rate</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_MortgageLoansOnRealEstateBearingWeightedAverageFixedInterestRate_lbl" xml:lang="en-US">Mortgage loans on real estate bearing weighted average fixed interest rate</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_WeightedAverageFixedInterestRate" xlink:label="cli_WeightedAverageFixedInterestRate" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_WeightedAverageFixedInterestRate" xlink:to="cli_WeightedAverageFixedInterestRate_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_WeightedAverageFixedInterestRate_lbl" xml:lang="en-US">Weighted Average Fixed Interest Rate</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_WeightedAverageFixedInterestRate_lbl" xml:lang="en-US">Weighted Average Fixed Interest Rate</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_WeightedAverageFixedInterestRate_lbl" xml:lang="en-US">Weighted average fixed interest rate</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RepaymentsOfLongTermDebt" xlink:label="us-gaap_RepaymentsOfLongTermDebt" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RepaymentsOfLongTermDebt" xlink:to="us-gaap_RepaymentsOfLongTermDebt_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RepaymentsOfLongTermDebt_lbl" xml:lang="en-US">Repayments of Long-term Debt</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RepaymentsOfLongTermDebt_lbl" xml:lang="en-US">Repayments of debt</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_RepaymentsOfLongTermDebt_lbl" xml:lang="en-US">Repayments of Long-term Debt, Total</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_NumberOfOwnedProperties" xlink:label="cli_NumberOfOwnedProperties" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_NumberOfOwnedProperties" xlink:to="cli_NumberOfOwnedProperties_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_NumberOfOwnedProperties_lbl" xml:lang="en-US">Number Of Owned Properties</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_NumberOfOwnedProperties_lbl" xml:lang="en-US">Number Of Owned Properties</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_NumberOfOwnedProperties_lbl" xml:lang="en-US">Number of owned office properties</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_NumberOfPropertySold" xlink:label="cli_NumberOfPropertySold" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_NumberOfPropertySold" xlink:to="cli_NumberOfPropertySold_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_NumberOfPropertySold_lbl" xml:lang="en-US">Number of Property Sold</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_NumberOfPropertySold_lbl" xml:lang="en-US">Number of Property Sold</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_NumberOfPropertySold_lbl" xml:lang="en-US">Number of properties sold</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_VentureGainLossOnSaleOfRealEstate" xlink:label="cli_VentureGainLossOnSaleOfRealEstate" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_VentureGainLossOnSaleOfRealEstate" xlink:to="cli_VentureGainLossOnSaleOfRealEstate_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_VentureGainLossOnSaleOfRealEstate_lbl" xml:lang="en-US">Venture Gain Loss On Sale Of Real Estate</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_VentureGainLossOnSaleOfRealEstate_lbl" xml:lang="en-US">Venture Gain Loss On Sale Of Real Estate</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_VentureGainLossOnSaleOfRealEstate_lbl" xml:lang="en-US">Venture gain (loss) on sale of real estate</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ImpairmentCharge" xlink:label="cli_ImpairmentCharge" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ImpairmentCharge" xlink:to="cli_ImpairmentCharge_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ImpairmentCharge_lbl" xml:lang="en-US">Impairment Charge</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ImpairmentCharge_lbl" xml:lang="en-US">Impairment Charge</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="cli_ImpairmentCharge_lbl" xml:lang="en-US">Impairment of property</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ImpairmentCharge_lbl" xml:lang="en-US">Impairment charge on property</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="cli_ImpairmentCharge_lbl" xml:lang="en-US">Impairment of property</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_PercentageOfSharingExcessOfAllocatedAmountsForEachPortfolioProperty" xlink:label="cli_PercentageOfSharingExcessOfAllocatedAmountsForEachPortfolioProperty" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_PercentageOfSharingExcessOfAllocatedAmountsForEachPortfolioProperty" xlink:to="cli_PercentageOfSharingExcessOfAllocatedAmountsForEachPortfolioProperty_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_PercentageOfSharingExcessOfAllocatedAmountsForEachPortfolioProperty_lbl" xml:lang="en-US">Percentage Of Sharing Excess Of Allocated Amounts For Each Portfolio Property</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_PercentageOfSharingExcessOfAllocatedAmountsForEachPortfolioProperty_lbl" xml:lang="en-US">Percentage Of Sharing Excess Of Allocated Amounts For Each Portfolio Property</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_PercentageOfSharingExcessOfAllocatedAmountsForEachPortfolioProperty_lbl" xml:lang="en-US">Sharing percent of amount realized</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_HoldingAndDistributionPatternUnderOperatingAgreement" xlink:label="cli_HoldingAndDistributionPatternUnderOperatingAgreement" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_HoldingAndDistributionPatternUnderOperatingAgreement" xlink:to="cli_HoldingAndDistributionPatternUnderOperatingAgreement_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_HoldingAndDistributionPatternUnderOperatingAgreement_lbl" xml:lang="en-US">Holding And Distribution Pattern Under Operating Agreement</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_HoldingAndDistributionPatternUnderOperatingAgreement_lbl" xml:lang="en-US">Holding and distribution pattern under operating agreement</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_HoldingAndDistributionPatternUnderOperatingAgreement_lbl" xml:lang="en-US">Holding and distribution pattern under operating agreement</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_PFVMember" xlink:label="cli_PFVMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_PFVMember" xlink:to="cli_PFVMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_PFVMember_lbl" xml:lang="en-US">P F V [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_PFVMember_lbl" xml:lang="en-US">P F V [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_PFVMember_lbl" xml:lang="en-US">PFV [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_GeGaleMember" xlink:label="cli_GeGaleMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_GeGaleMember" xlink:to="cli_GeGaleMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_GeGaleMember_lbl" xml:lang="en-US">GE Gale [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_GeGaleMember_lbl" xml:lang="en-US">Ge Gale [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_GeGaleMember_lbl" xml:lang="en-US">GE Gale [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ShareOfGainOnSaleOfRealEstate" xlink:label="cli_ShareOfGainOnSaleOfRealEstate" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ShareOfGainOnSaleOfRealEstate" xlink:to="cli_ShareOfGainOnSaleOfRealEstate_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ShareOfGainOnSaleOfRealEstate_lbl" xml:lang="en-US">Company share of gain or loss recognized by the venture on sale of property.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ShareOfGainOnSaleOfRealEstate_lbl" xml:lang="en-US">Share Of Gain On Sale Of Real Estate</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ShareOfGainOnSaleOfRealEstate_lbl" xml:lang="en-US">Share of gain on sale of real estate</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_GaleKimballMember" xlink:label="cli_GaleKimballMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_GaleKimballMember" xlink:to="cli_GaleKimballMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_GaleKimballMember_lbl" xml:lang="en-US">Gale Kimball [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_GaleKimballMember_lbl" xml:lang="en-US">Gale Kimball [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_GaleKimballMember_lbl" xml:lang="en-US">Gale Kimball [Member]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_BusinessAcquisitionDateOfAcquisitionAgreement" xlink:label="us-gaap_BusinessAcquisitionDateOfAcquisitionAgreement" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BusinessAcquisitionDateOfAcquisitionAgreement" xlink:to="us-gaap_BusinessAcquisitionDateOfAcquisitionAgreement_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_BusinessAcquisitionDateOfAcquisitionAgreement_lbl" xml:lang="en-US">Date of acquisition</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_DistributionReceived" xlink:label="cli_DistributionReceived" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_DistributionReceived" xlink:to="cli_DistributionReceived_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_DistributionReceived_lbl" xml:lang="en-US">Distributions received from the venture during the current period.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_DistributionReceived_lbl" xml:lang="en-US">Distribution Received</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_DistributionReceived_lbl" xml:lang="en-US">Distribution received</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ParticipationRightsPaymentDistribution" xlink:label="cli_ParticipationRightsPaymentDistribution" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ParticipationRightsPaymentDistribution" xlink:to="cli_ParticipationRightsPaymentDistribution_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ParticipationRightsPaymentDistribution_lbl" xml:lang="en-US">Payment made pursuant to the participation rights.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ParticipationRightsPaymentDistribution_lbl" xml:lang="en-US">Participation Rights Payment Distribution</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ParticipationRightsPaymentDistribution_lbl" xml:lang="en-US">Payment of Participation Rights</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwelveVreelandMember" xlink:label="cli_TwelveVreelandMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwelveVreelandMember" xlink:to="cli_TwelveVreelandMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwelveVreelandMember_lbl" xml:lang="en-US">Twelve Vreeland [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwelveVreelandMember_lbl" xml:lang="en-US">Twelve Vreeland [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwelveVreelandMember_lbl" xml:lang="en-US">12 Vreeland [Member]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RangeAxis" xlink:label="us-gaap_RangeAxis" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RangeAxis" xlink:to="us-gaap_RangeAxis_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RangeAxis_lbl" xml:lang="en-US">Range [Axis]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RangeMember" xlink:label="us-gaap_RangeMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RangeMember" xlink:to="us-gaap_RangeMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RangeMember_lbl" xml:lang="en-US">Range [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RangeMember_lbl" xml:lang="en-US">Range [Domain]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MaximumMember" xlink:label="us-gaap_MaximumMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MaximumMember" xlink:to="us-gaap_MaximumMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MaximumMember_lbl" xml:lang="en-US">Maximum [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_MaximumMember_lbl" xml:lang="en-US">Maximum [Member]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MinimumMember" xlink:label="us-gaap_MinimumMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MinimumMember" xlink:to="us-gaap_MinimumMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MinimumMember_lbl" xml:lang="en-US">Minimum [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_MinimumMember_lbl" xml:lang="en-US">Minimum [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_BostonDowntownCrossingMember" xlink:label="cli_BostonDowntownCrossingMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_BostonDowntownCrossingMember" xlink:to="cli_BostonDowntownCrossingMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_BostonDowntownCrossingMember_lbl" xml:lang="en-US">Boston Downtown Crossing [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_BostonDowntownCrossingMember_lbl" xml:lang="en-US">Boston Downtown Crossing [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_BostonDowntownCrossingMember_lbl" xml:lang="en-US">Boston-Downtown Crossing [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_InternalRateOfReturn" xlink:label="cli_InternalRateOfReturn" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_InternalRateOfReturn" xlink:to="cli_InternalRateOfReturn_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_InternalRateOfReturn_lbl" xml:lang="en-US">Internal Rate of Return</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_InternalRateOfReturn_lbl" xml:lang="en-US">Internal Rate of Return</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_InternalRateOfReturn_lbl" xml:lang="en-US">Internal rate of return</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="cli_InternalRateOfReturn_lbl" xml:lang="en-US">Percentage of interest in venture</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_VenturePropertyAcquisitionCost" xlink:label="cli_VenturePropertyAcquisitionCost" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_VenturePropertyAcquisitionCost" xlink:to="cli_VenturePropertyAcquisitionCost_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_VenturePropertyAcquisitionCost_lbl" xml:lang="en-US">Cost of property acquired by the venture.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_VenturePropertyAcquisitionCost_lbl" xml:lang="en-US">Venture property acquisition cost</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_VenturePropertyAcquisitionCost_lbl" xml:lang="en-US">Venture property acquisition cost</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_GaleJeffersonMember" xlink:label="cli_GaleJeffersonMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_GaleJeffersonMember" xlink:to="cli_GaleJeffersonMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_GaleJeffersonMember_lbl" xml:lang="en-US">Gale Jefferson [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_GaleJeffersonMember_lbl" xml:lang="en-US">Gale Jefferson [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_GaleJeffersonMember_lbl" xml:lang="en-US">Gale Jefferson [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneJeffersonRoadLLCMember" xlink:label="cli_OneJeffersonRoadLLCMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneJeffersonRoadLLCMember" xlink:to="cli_OneJeffersonRoadLLCMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneJeffersonRoadLLCMember_lbl" xml:lang="en-US">One Jefferson Road L L C [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneJeffersonRoadLLCMember_lbl" xml:lang="en-US">One Jefferson Road L L C [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneJeffersonRoadLLCMember_lbl" xml:lang="en-US">One Jefferson [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_MortgageLoanExtensionPeriod" xlink:label="cli_MortgageLoanExtensionPeriod" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_MortgageLoanExtensionPeriod" xlink:to="cli_MortgageLoanExtensionPeriod_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_MortgageLoanExtensionPeriod_lbl" xml:lang="en-US">Mortgage Loan Extension Period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_MortgageLoanExtensionPeriod_lbl" xml:lang="en-US">Mortgage Loan Extension Period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_MortgageLoanExtensionPeriod_lbl" xml:lang="en-US">Mortgage loan, extension period</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_AnnualCompoundReturnOnMembersCapitalContributions" xlink:label="cli_AnnualCompoundReturnOnMembersCapitalContributions" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_AnnualCompoundReturnOnMembersCapitalContributions" xlink:to="cli_AnnualCompoundReturnOnMembersCapitalContributions_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_AnnualCompoundReturnOnMembersCapitalContributions_lbl" xml:lang="en-US">Annual Compound Return On The Members Capital Contributions</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_AnnualCompoundReturnOnMembersCapitalContributions_lbl" xml:lang="en-US">Annual Compound Return On The Members Capital Contributions</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_AnnualCompoundReturnOnMembersCapitalContributions_lbl" xml:lang="en-US">Percentage of annual compound return to the Member's Capital Contributions</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_PercentageOfDistributionToParentCompanyAndSubsidiary" xlink:label="cli_PercentageOfDistributionToParentCompanyAndSubsidiary" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_PercentageOfDistributionToParentCompanyAndSubsidiary" xlink:to="cli_PercentageOfDistributionToParentCompanyAndSubsidiary_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_PercentageOfDistributionToParentCompanyAndSubsidiary_lbl" xml:lang="en-US">Percentage Of Distribution To Parent Company and Subsidiary</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_PercentageOfDistributionToParentCompanyAndSubsidiary_lbl" xml:lang="en-US">Percentage Of Distribution To Parent Company and Subsidiary</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_PercentageOfDistributionToParentCompanyAndSubsidiary_lbl" xml:lang="en-US">Percentage amount distributed to the Company and Hampshire</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_CommingledPensionTrustFundMember" xlink:label="cli_CommingledPensionTrustFundMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_CommingledPensionTrustFundMember" xlink:to="cli_CommingledPensionTrustFundMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_CommingledPensionTrustFundMember_lbl" xml:lang="en-US">Commingled Pension Trust Fund [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_CommingledPensionTrustFundMember_lbl" xml:lang="en-US">Commingled Pension Trust Fund [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_CommingledPensionTrustFundMember_lbl" xml:lang="en-US">Commingled Pension Trust Fund [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_RouteNinetyThreeParticipantMember" xlink:label="cli_RouteNinetyThreeParticipantMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_RouteNinetyThreeParticipantMember" xlink:to="cli_RouteNinetyThreeParticipantMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_RouteNinetyThreeParticipantMember_lbl" xml:lang="en-US">Route Ninety Three Participant [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_RouteNinetyThreeParticipantMember_lbl" xml:lang="en-US">Route Ninety Three Participant [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_RouteNinetyThreeParticipantMember_lbl" xml:lang="en-US">Route 93 Participant [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_RouteNinetyThreeMasterMember" xlink:label="cli_RouteNinetyThreeMasterMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_RouteNinetyThreeMasterMember" xlink:to="cli_RouteNinetyThreeMasterMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_RouteNinetyThreeMasterMember_lbl" xml:lang="en-US">Route 93 Master [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_RouteNinetyThreeMasterMember_lbl" xml:lang="en-US">Route Ninety Three Master [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_RouteNinetyThreeMasterMember_lbl" xml:lang="en-US">Route 93 Master LLC [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_RouteNinetyThreeParticipantAndCommingledPensionTrustFundMember" xlink:label="cli_RouteNinetyThreeParticipantAndCommingledPensionTrustFundMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_RouteNinetyThreeParticipantAndCommingledPensionTrustFundMember" xlink:to="cli_RouteNinetyThreeParticipantAndCommingledPensionTrustFundMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_RouteNinetyThreeParticipantAndCommingledPensionTrustFundMember_lbl" xml:lang="en-US">Route Ninety Three Participant And Commingled Pension Trust Fund [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_RouteNinetyThreeParticipantAndCommingledPensionTrustFundMember_lbl" xml:lang="en-US">Route Ninety Three Participant And Commingled Pension Trust Fund [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_RouteNinetyThreeParticipantAndCommingledPensionTrustFundMember_lbl" xml:lang="en-US">Route 93 Participant/Commingled Pension Trust Fund [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_Route93MasterLlcRoute93BedfordMasterLlcMember" xlink:label="cli_Route93MasterLlcRoute93BedfordMasterLlcMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_Route93MasterLlcRoute93BedfordMasterLlcMember" xlink:to="cli_Route93MasterLlcRoute93BedfordMasterLlcMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_Route93MasterLlcRoute93BedfordMasterLlcMember_lbl" xml:lang="en-US">Route 93 Master LLC/Route 93 Bedford Master LLC [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_Route93MasterLlcRoute93BedfordMasterLlcMember_lbl" xml:lang="en-US">Route93 Master Llc Route93 Bedford Master Llc [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_Route93MasterLlcRoute93BedfordMasterLlcMember_lbl" xml:lang="en-US">Route 93 Master LLC/Route 93 Bedford Master LLC [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ThirdPartyOwnershipPercent" xlink:label="cli_ThirdPartyOwnershipPercent" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ThirdPartyOwnershipPercent" xlink:to="cli_ThirdPartyOwnershipPercent_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ThirdPartyOwnershipPercent_lbl" xml:lang="en-US">Third Party Ownership Percent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ThirdPartyOwnershipPercent_lbl" xml:lang="en-US">Third Party Ownership Percent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ThirdPartyOwnershipPercent_lbl" xml:lang="en-US">Ownership percentage of third party venture</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ProfitAndLossDistributionSharedByPartnersUnderJointVenture" xlink:label="cli_ProfitAndLossDistributionSharedByPartnersUnderJointVenture" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ProfitAndLossDistributionSharedByPartnersUnderJointVenture" xlink:to="cli_ProfitAndLossDistributionSharedByPartnersUnderJointVenture_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ProfitAndLossDistributionSharedByPartnersUnderJointVenture_lbl" xml:lang="en-US">Profit And Loss Distribution Shared By Partners Under Joint Venture</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ProfitAndLossDistributionSharedByPartnersUnderJointVenture_lbl" xml:lang="en-US">Profit And Loss Distribution Shared By Partners Under Joint Venture</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ProfitAndLossDistributionSharedByPartnersUnderJointVenture_lbl" xml:lang="en-US">Percentage of profit/loss distribution shared by partners</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_JointVentureInvestmentYield" xlink:label="cli_JointVentureInvestmentYield" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_JointVentureInvestmentYield" xlink:to="cli_JointVentureInvestmentYield_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_JointVentureInvestmentYield_lbl" xml:lang="en-US">Joint Venture Investment Yield</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_JointVentureInvestmentYield_lbl" xml:lang="en-US">Joint Venture Investment Yield</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_JointVentureInvestmentYield_lbl" xml:lang="en-US">Joint venture investment yield percentage</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ProfitAndLossDistributionSharedByPartnersUnderJointVentureWhenInternalRateOfReturnReached" xlink:label="cli_ProfitAndLossDistributionSharedByPartnersUnderJointVentureWhenInternalRateOfReturnReached" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ProfitAndLossDistributionSharedByPartnersUnderJointVentureWhenInternalRateOfReturnReached" xlink:to="cli_ProfitAndLossDistributionSharedByPartnersUnderJointVentureWhenInternalRateOfReturnReached_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ProfitAndLossDistributionSharedByPartnersUnderJointVentureWhenInternalRateOfReturnReached_lbl" xml:lang="en-US">Profit And Loss Distribution Shared By Partners Under Joint Venture When Internal Rate Of Return Reached</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ProfitAndLossDistributionSharedByPartnersUnderJointVentureWhenInternalRateOfReturnReached_lbl" xml:lang="en-US">Profit And Loss Distribution Shared By Partners Under Joint Venture When Internal Rate Of Return Reached</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ProfitAndLossDistributionSharedByPartnersUnderJointVentureWhenInternalRateOfReturnReached_lbl" xml:lang="en-US">Percentage of profit/loss distribution shared by partners after internal rate of return is reached</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ImpairmentChargesAttributableToNoncontrollingInterest" xlink:label="cli_ImpairmentChargesAttributableToNoncontrollingInterest" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ImpairmentChargesAttributableToNoncontrollingInterest" xlink:to="cli_ImpairmentChargesAttributableToNoncontrollingInterest_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ImpairmentChargesAttributableToNoncontrollingInterest_lbl" xml:lang="en-US">Impairment charges attributable to noncontrolling interest</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ImpairmentChargesAttributableToNoncontrollingInterest_lbl" xml:lang="en-US">Impairment Charges Attributable To Noncontrolling Interest</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ImpairmentChargesAttributableToNoncontrollingInterest_lbl" xml:lang="en-US">Impairment charges attributable to noncontrolling interest</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_PrincetonForrestalVillageMember" xlink:label="cli_PrincetonForrestalVillageMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_PrincetonForrestalVillageMember" xlink:to="cli_PrincetonForrestalVillageMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_PrincetonForrestalVillageMember_lbl" xml:lang="en-US">Princeton Forrestal Village [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_PrincetonForrestalVillageMember_lbl" xml:lang="en-US">Princeton Forrestal Village [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_PrincetonForrestalVillageMember_lbl" xml:lang="en-US">Princeton Forrestal Village [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_EquityMethodInvestmentSummarizedFinancialInformationRentalPropertyNet" xlink:label="cli_EquityMethodInvestmentSummarizedFinancialInformationRentalPropertyNet" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_EquityMethodInvestmentSummarizedFinancialInformationRentalPropertyNet" xlink:to="cli_EquityMethodInvestmentSummarizedFinancialInformationRentalPropertyNet_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_EquityMethodInvestmentSummarizedFinancialInformationRentalPropertyNet_lbl" xml:lang="en-US">Equity Method Investment, Summarized Financial Information, Rental Property, Net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_EquityMethodInvestmentSummarizedFinancialInformationRentalPropertyNet_lbl" xml:lang="en-US">Equity Method Investment, Summarized Financial Information, Rental Property, Net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_EquityMethodInvestmentSummarizedFinancialInformationRentalPropertyNet_lbl" xml:lang="en-US">Rental property, net</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_EquityMethodInvestmentSummarizedFinancialInformationOtherAssets" xlink:label="cli_EquityMethodInvestmentSummarizedFinancialInformationOtherAssets" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_EquityMethodInvestmentSummarizedFinancialInformationOtherAssets" xlink:to="cli_EquityMethodInvestmentSummarizedFinancialInformationOtherAssets_lbl" />
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_EquityMethodInvestmentSummarizedFinancialInformationAssets_lbl" xml:lang="en-US">Total assets</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_EquityMethodInvestmentSummarizedFinancialInformationSecuredDebt" xlink:label="cli_EquityMethodInvestmentSummarizedFinancialInformationSecuredDebt" />
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_EquityMethodInvestmentSummarizedFinancialInformationSecuredDebt_lbl" xml:lang="en-US">Mortgages, loans payable and other obligations</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_EquityMethodInvestmentSummarizedFinancialInformationOtherLiabilities" xlink:label="cli_EquityMethodInvestmentSummarizedFinancialInformationOtherLiabilities" />
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_EquityMethodInvestmentSummarizedFinancialInformationOtherLiabilities_lbl" xml:lang="en-US">Equity Method Investment, Summarized Financial Information, Other Liabilities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_EquityMethodInvestmentSummarizedFinancialInformationOtherLiabilities_lbl" xml:lang="en-US">Equity Method Investment, Summarized Financial Information, Other Liabilities</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_EquityMethodInvestmentSummarizedFinancialInformationOtherLiabilities_lbl" xml:lang="en-US">Other liabilities</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityMethodInvestmentSummarizedFinancialInformationEquityOrCapital" xlink:label="us-gaap_EquityMethodInvestmentSummarizedFinancialInformationEquityOrCapital" />
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EquityMethodInvestmentSummarizedFinancialInformationEquityOrCapital_lbl" xml:lang="en-US">Equity Method Investment, Summarized Financial Information, Equity or Capital</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_EquityMethodInvestmentSummarizedFinancialInformationEquityOrCapital_lbl" xml:lang="en-US">Partners'/members' capital (deficit)</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityMethodInvestmentSummarizedFinancialInformationLiabilitiesAndEquity" xlink:label="us-gaap_EquityMethodInvestmentSummarizedFinancialInformationLiabilitiesAndEquity" />
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EquityMethodInvestmentSummarizedFinancialInformationLiabilitiesAndEquity_lbl" xml:lang="en-US">Equity Method Investment, Summarized Financial Information, Liabilities and Equity</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_EquityMethodInvestmentSummarizedFinancialInformationLiabilitiesAndEquity_lbl" xml:lang="en-US">Total liabilities and partners'/members' capital (deficit)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_EquityMethodInvestmentSummarizedFinancialInformationLiabilitiesAndEquity_lbl" xml:lang="en-US">Total liabilities and partners'/members' capital (deficit)</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_MGGMember" xlink:label="cli_MGGMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_MGGMember" xlink:to="cli_MGGMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_MGGMember_lbl" xml:lang="en-US">M-G-G [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_MGGMember_lbl" xml:lang="en-US">M G G [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_MGGMember_lbl" xml:lang="en-US">M-G-G [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_RouteNintyThreePortfolioMember" xlink:label="cli_RouteNintyThreePortfolioMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_RouteNintyThreePortfolioMember" xlink:to="cli_RouteNintyThreePortfolioMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_RouteNintyThreePortfolioMember_lbl" xml:lang="en-US">Route Ninty Three Portfolio [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_RouteNintyThreePortfolioMember_lbl" xml:lang="en-US">Route Ninty Three Portfolio [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_RouteNintyThreePortfolioMember_lbl" xml:lang="en-US">Route 93 Portfolio [Member]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue" xlink:label="us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue" xlink:to="us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue_lbl" xml:lang="en-US">Equity Method Investment, Summarized Financial Information, Net Sales or Gross Revenue</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue_lbl" xml:lang="en-US">Total revenues</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_EquityMethodInvestmentSummarizedFinancialInformationOperatingAndOther" xlink:label="cli_EquityMethodInvestmentSummarizedFinancialInformationOperatingAndOther" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_EquityMethodInvestmentSummarizedFinancialInformationOperatingAndOther" xlink:to="cli_EquityMethodInvestmentSummarizedFinancialInformationOperatingAndOther_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_EquityMethodInvestmentSummarizedFinancialInformationOperatingAndOther_lbl" xml:lang="en-US">Equity Method Investment, Summarized Financial Information, Operating and Other</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_EquityMethodInvestmentSummarizedFinancialInformationOperatingAndOther_lbl" xml:lang="en-US">Equity Method Investment, Summarized Financial Information, Operating and Other</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="cli_EquityMethodInvestmentSummarizedFinancialInformationOperatingAndOther_lbl" xml:lang="en-US">Operating and other</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_EquityMethodInvestmentSummarizedFinancialInformationOperatingAndOther_lbl" xml:lang="en-US">Operating and other</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_EquityMethodInvestmentSummarizedFinancialInformationDepreciationAndAmortization" xlink:label="cli_EquityMethodInvestmentSummarizedFinancialInformationDepreciationAndAmortization" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_EquityMethodInvestmentSummarizedFinancialInformationDepreciationAndAmortization" xlink:to="cli_EquityMethodInvestmentSummarizedFinancialInformationDepreciationAndAmortization_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_EquityMethodInvestmentSummarizedFinancialInformationDepreciationAndAmortization_lbl" xml:lang="en-US">Equity Method Investment, Summarized Financial Information, Depreciation and Amortization</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_EquityMethodInvestmentSummarizedFinancialInformationDepreciationAndAmortization_lbl" xml:lang="en-US">Equity Method Investment, Summarized Financial Information, Depreciation and Amortization</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_EquityMethodInvestmentSummarizedFinancialInformationDepreciationAndAmortization_lbl" xml:lang="en-US">Depreciation and amortization</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_EquityMethodInvestmentSummarizedFinancialInformationInterestExpense" xlink:label="cli_EquityMethodInvestmentSummarizedFinancialInformationInterestExpense" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_EquityMethodInvestmentSummarizedFinancialInformationInterestExpense" xlink:to="cli_EquityMethodInvestmentSummarizedFinancialInformationInterestExpense_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_EquityMethodInvestmentSummarizedFinancialInformationInterestExpense_lbl" xml:lang="en-US">Equity Method Investment, Summarized Financial Information, Interest Expense</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_EquityMethodInvestmentSummarizedFinancialInformationInterestExpense_lbl" xml:lang="en-US">Equity Method Investment, Summarized Financial Information, Interest Expense</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_EquityMethodInvestmentSummarizedFinancialInformationInterestExpense_lbl" xml:lang="en-US">Interest expense</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss" xlink:label="us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss" xlink:to="us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss_lbl" xml:lang="en-US">Equity Method Investment, Summarized Financial Information, Net Income (Loss)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss_lbl" xml:lang="en-US">Net income</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredCostsLeasingGross" xlink:label="us-gaap_DeferredCostsLeasingGross" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredCostsLeasingGross" xlink:to="us-gaap_DeferredCostsLeasingGross_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredCostsLeasingGross_lbl" xml:lang="en-US">Deferred Costs, Leasing, Gross</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DeferredCostsLeasingGross_lbl" xml:lang="en-US">Deferred leasing costs</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredFinanceCostsGross" xlink:label="us-gaap_DeferredFinanceCostsGross" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredFinanceCostsGross" xlink:to="us-gaap_DeferredFinanceCostsGross_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredFinanceCostsGross_lbl" xml:lang="en-US">Deferred Finance Costs, Gross</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DeferredFinanceCostsGross_lbl" xml:lang="en-US">Deferred financing costs</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_DeferredCostsGross" xlink:label="cli_DeferredCostsGross" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_DeferredCostsGross" xlink:to="cli_DeferredCostsGross_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_DeferredCostsGross_lbl" xml:lang="en-US">Deferred Costs, Gross</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_DeferredCostsGross_lbl" xml:lang="en-US">Deferred Costs, Gross</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_DeferredCostsGross_lbl" xml:lang="en-US">Deferred charges, gross</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="cli_DeferredCostsGross_lbl" xml:lang="en-US">Deferred charges, gross</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_AccumulatedAmortizationLeasingAndFinancingCosts" xlink:label="cli_AccumulatedAmortizationLeasingAndFinancingCosts" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_AccumulatedAmortizationLeasingAndFinancingCosts" xlink:to="cli_AccumulatedAmortizationLeasingAndFinancingCosts_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_AccumulatedAmortizationLeasingAndFinancingCosts_lbl" xml:lang="en-US">Accumulated Amortization Leasing And Financing Costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_AccumulatedAmortizationLeasingAndFinancingCosts_lbl" xml:lang="en-US">Accumulated Amortization Leasing And Financing Costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="cli_AccumulatedAmortizationLeasingAndFinancingCosts_lbl" xml:lang="en-US">Accumulated amortization</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredCosts" xlink:label="us-gaap_DeferredCosts" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredCosts" xlink:to="us-gaap_DeferredCosts_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredCosts_lbl" xml:lang="en-US">Deferred charges, net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_DeferredCosts_lbl" xml:lang="en-US">Deferred charges, net</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetAcquiredInPlaceLeases" xlink:label="us-gaap_FiniteLivedIntangibleAssetAcquiredInPlaceLeases" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FiniteLivedIntangibleAssetAcquiredInPlaceLeases" xlink:to="us-gaap_FiniteLivedIntangibleAssetAcquiredInPlaceLeases_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_FiniteLivedIntangibleAssetAcquiredInPlaceLeases_lbl" xml:lang="en-US">Finite-Lived Intangible Asset, Acquired-in-Place Leases</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_FiniteLivedIntangibleAssetAcquiredInPlaceLeases_lbl" xml:lang="en-US">In-place lease values, related intangible and other assets, net</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PrepaidExpenseAndOtherAssets" xlink:label="us-gaap_PrepaidExpenseAndOtherAssets" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PrepaidExpenseAndOtherAssets" xlink:to="us-gaap_PrepaidExpenseAndOtherAssets_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PrepaidExpenseAndOtherAssets_lbl" xml:lang="en-US">Prepaid expenses and other assets, net</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_PrepaidExpenseAndOtherAssets_lbl" xml:lang="en-US">Prepaid Expense and Other Assets, Total</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SecurityDeposit" xlink:label="us-gaap_SecurityDeposit" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SecurityDeposit" xlink:to="us-gaap_SecurityDeposit_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SecurityDeposit_lbl" xml:lang="en-US">Security Deposit</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SecurityDeposit_lbl" xml:lang="en-US">Security deposits</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EscrowDeposit" xlink:label="us-gaap_EscrowDeposit" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EscrowDeposit" xlink:to="us-gaap_EscrowDeposit_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EscrowDeposit_lbl" xml:lang="en-US">Escrow Deposit</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_EscrowDeposit_lbl" xml:lang="en-US">Escrow and other reserve funds</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_RidgefieldParkMember" xlink:label="cli_RidgefieldParkMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_RidgefieldParkMember" xlink:to="cli_RidgefieldParkMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_RidgefieldParkMember_lbl" xml:lang="en-US">Ridgefield Park [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_RidgefieldParkMember_lbl" xml:lang="en-US">Ridgefield Park [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_RidgefieldParkMember_lbl" xml:lang="en-US">Ridgefield Park [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_RealEstateCommercialPropertyArea" xlink:label="cli_RealEstateCommercialPropertyArea" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_RealEstateCommercialPropertyArea" xlink:to="cli_RealEstateCommercialPropertyArea_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_RealEstateCommercialPropertyArea_lbl" xml:lang="en-US">Real Estate, Commercial Property, Area</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_RealEstateCommercialPropertyArea_lbl" xml:lang="en-US">Real Estate, Commercial Property, Area</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_RealEstateCommercialPropertyArea_lbl" xml:lang="en-US">Aggregate square feet of the property</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GainLossOnSaleOfProperties" xlink:label="us-gaap_GainLossOnSaleOfProperties" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GainLossOnSaleOfProperties" xlink:to="us-gaap_GainLossOnSaleOfProperties_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_GainLossOnSaleOfProperties_lbl" xml:lang="en-US">Gain (Loss) on Sale of Properties</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_GainLossOnSaleOfProperties_lbl" xml:lang="en-US">Gain recorded on disposal of office property</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_MortgageLoanOnRealEstateMaturityDate" xlink:label="cli_MortgageLoanOnRealEstateMaturityDate" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_MortgageLoanOnRealEstateMaturityDate" xlink:to="cli_MortgageLoanOnRealEstateMaturityDate_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_MortgageLoanOnRealEstateMaturityDate_lbl" xml:lang="en-US">Mortgage loan on real estate maturity date</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_MortgageLoanOnRealEstateMaturityDate_lbl" xml:lang="en-US">Mortgage Loan On Real Estate Maturity Date</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_MortgageLoanOnRealEstateMaturityDate_lbl" xml:lang="en-US">Mortgage loan maturity date</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_TangibleAssetImpairmentCharges" xlink:label="us-gaap_TangibleAssetImpairmentCharges" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TangibleAssetImpairmentCharges" xlink:to="us-gaap_TangibleAssetImpairmentCharges_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_TangibleAssetImpairmentCharges_lbl" xml:lang="en-US">Tangible Asset Impairment Charges</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_TangibleAssetImpairmentCharges_lbl" xml:lang="en-US">Impairment charge on property</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_TangibleAssetImpairmentCharges_lbl" xml:lang="en-US">Tangible Asset Impairment Charges, Total</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue" xlink:label="us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue" xlink:to="us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue_lbl" xml:lang="en-US">Disposal Group, Including Discontinued Operation, Revenue</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue_lbl" xml:lang="en-US">Total revenues</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingExpense" xlink:label="us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingExpense" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingExpense" xlink:to="us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingExpense_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingExpense_lbl" xml:lang="en-US">Disposal Group Including Discontinued Operation Operating Expense</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingExpense_lbl" xml:lang="en-US">Operating and other expenses</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:label="us-gaap_DisposalGroupIncludingDiscontinuedOperationOperatingExpense_lbl" xml:lang="en-US">Operating and other expenses</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DisposalGroupIncludingDiscontinuedOperationInterestExpense" xlink:label="us-gaap_DisposalGroupIncludingDiscontinuedOperationInterestExpense" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DisposalGroupIncludingDiscontinuedOperationInterestExpense" xlink:to="us-gaap_DisposalGroupIncludingDiscontinuedOperationInterestExpense_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DisposalGroupIncludingDiscontinuedOperationInterestExpense_lbl" xml:lang="en-US">Disposal Group, Including Discontinued Operation, Interest Expense</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_DisposalGroupIncludingDiscontinuedOperationInterestExpense_lbl" xml:lang="en-US">Interest expense (net of interest income)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DisposalGroupIncludingDiscontinuedOperationInterestExpense_lbl" xml:lang="en-US">Interest expense (net of interest income)</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:label="us-gaap_DebtInstrumentTable" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_DebtInstrumentTable_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentTable_lbl" xml:lang="en-US">Schedule of Long-term Debt Instruments [Table]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_LongTermDebtLineItems" xlink:label="cli_LongTermDebtLineItems" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_LongTermDebtLineItems" xlink:to="cli_LongTermDebtLineItems_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_LongTermDebtLineItems_lbl" xml:lang="en-US">Long-Term Debt [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_LongTermDebtLineItems_lbl" xml:lang="en-US">Long-Term Debt [Line Items]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SeniorNotes" xlink:label="us-gaap_SeniorNotes" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SeniorNotes" xlink:to="us-gaap_SeniorNotes_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SeniorNotes_lbl" xml:lang="en-US">Senior Notes</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SeniorNotes_lbl" xml:lang="en-US">Principal amount of Senior Unsecured Notes</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_SeniorNotes_lbl" xml:lang="en-US">Senior Notes, Total</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentMaturityDate" xlink:label="us-gaap_DebtInstrumentMaturityDate" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentMaturityDate" xlink:to="us-gaap_DebtInstrumentMaturityDate_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentMaturityDate_lbl" xml:lang="en-US">Debt Instrument, Maturity Date</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtInstrumentMaturityDate_lbl" xml:lang="en-US">Maturity date of the Senior Unsecured Notes</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DebtInstrumentMaturityDate_lbl" xml:lang="en-US">Loan maturity date</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_RedemptionPriceAsPercentageOfPrincipalPlusAccruedAndUnpaidInterest" xlink:label="cli_RedemptionPriceAsPercentageOfPrincipalPlusAccruedAndUnpaidInterest" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_RedemptionPriceAsPercentageOfPrincipalPlusAccruedAndUnpaidInterest" xlink:to="cli_RedemptionPriceAsPercentageOfPrincipalPlusAccruedAndUnpaidInterest_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_RedemptionPriceAsPercentageOfPrincipalPlusAccruedAndUnpaidInterest_lbl" xml:lang="en-US">Redemption Price As Percentage Of Principal Plus Accrued And Unpaid Interest</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_RedemptionPriceAsPercentageOfPrincipalPlusAccruedAndUnpaidInterest_lbl" xml:lang="en-US">Redemption Price As Percentage Of Principal Plus Accrued And Unpaid Interest</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_RedemptionPriceAsPercentageOfPrincipalPlusAccruedAndUnpaidInterest_lbl" xml:lang="en-US">Redemption price as a percentage of principal plus accrued and unpaid interest</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_UnsecuredDebtRedemptionPrice" xlink:label="cli_UnsecuredDebtRedemptionPrice" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_UnsecuredDebtRedemptionPrice" xlink:to="cli_UnsecuredDebtRedemptionPrice_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_UnsecuredDebtRedemptionPrice_lbl" xml:lang="en-US">Unsecured debt redemption price.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_UnsecuredDebtRedemptionPrice_lbl" xml:lang="en-US">Unsecured Debt Redemption Price</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_UnsecuredDebtRedemptionPrice_lbl" xml:lang="en-US">Unsecured debt redemption price</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="us-gaap_LongtermDebtTypeAxis" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongtermDebtTypeAxis" xlink:to="us-gaap_LongtermDebtTypeAxis_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongtermDebtTypeAxis_lbl" xml:lang="en-US">Long-term Debt, Type [Axis]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="us-gaap_LongtermDebtTypeDomain" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongtermDebtTypeDomain" xlink:to="us-gaap_LongtermDebtTypeDomain_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongtermDebtTypeDomain_lbl" xml:lang="en-US">Longterm Debt Type [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LongtermDebtTypeDomain_lbl" xml:lang="en-US">Long-term Debt, Type [Domain]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FivePointTwoFiveZeroPercentSeniorUnsecuredNotesDueJanuaryFifteenTwoThousandTwelveMember" xlink:label="cli_FivePointTwoFiveZeroPercentSeniorUnsecuredNotesDueJanuaryFifteenTwoThousandTwelveMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FivePointTwoFiveZeroPercentSeniorUnsecuredNotesDueJanuaryFifteenTwoThousandTwelveMember" xlink:to="cli_FivePointTwoFiveZeroPercentSeniorUnsecuredNotesDueJanuaryFifteenTwoThousandTwelveMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FivePointTwoFiveZeroPercentSeniorUnsecuredNotesDueJanuaryFifteenTwoThousandTwelveMember_lbl" xml:lang="en-US">5.250% Senior Unsecured Notes, due January 15, 2012</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FivePointTwoFiveZeroPercentSeniorUnsecuredNotesDueJanuaryFifteenTwoThousandTwelveMember_lbl" xml:lang="en-US">Five Point Two Five Zero Percent Senior Unsecured Notes Due January Fifteen Two Thousand Twelve [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FivePointTwoFiveZeroPercentSeniorUnsecuredNotesDueJanuaryFifteenTwoThousandTwelveMember_lbl" xml:lang="en-US">5.250% Senior Unsecured Notes, Due January 15, 2012 [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_SixPointOneFiveZeroPercentSeniorUnsecuredNotesDueDecemberFifteenTwoThousandTwelveMember" xlink:label="cli_SixPointOneFiveZeroPercentSeniorUnsecuredNotesDueDecemberFifteenTwoThousandTwelveMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_SixPointOneFiveZeroPercentSeniorUnsecuredNotesDueDecemberFifteenTwoThousandTwelveMember" xlink:to="cli_SixPointOneFiveZeroPercentSeniorUnsecuredNotesDueDecemberFifteenTwoThousandTwelveMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_SixPointOneFiveZeroPercentSeniorUnsecuredNotesDueDecemberFifteenTwoThousandTwelveMember_lbl" xml:lang="en-US">6.150% Senior Unsecured Notes, due December 15, 2012</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_SixPointOneFiveZeroPercentSeniorUnsecuredNotesDueDecemberFifteenTwoThousandTwelveMember_lbl" xml:lang="en-US">Six Point One Five Zero Percent Senior Unsecured Notes Due December Fifteen Two Thousand Twelve [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_SixPointOneFiveZeroPercentSeniorUnsecuredNotesDueDecemberFifteenTwoThousandTwelveMember_lbl" xml:lang="en-US">6.150% Senior Unsecured Notes, Due December 15, 2012 [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FivePointEightTwoZeroPercentSeniorUnsecuredNotesDueMarchFifteenTwoThousandThirteenMember" xlink:label="cli_FivePointEightTwoZeroPercentSeniorUnsecuredNotesDueMarchFifteenTwoThousandThirteenMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FivePointEightTwoZeroPercentSeniorUnsecuredNotesDueMarchFifteenTwoThousandThirteenMember" xlink:to="cli_FivePointEightTwoZeroPercentSeniorUnsecuredNotesDueMarchFifteenTwoThousandThirteenMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FivePointEightTwoZeroPercentSeniorUnsecuredNotesDueMarchFifteenTwoThousandThirteenMember_lbl" xml:lang="en-US">5.820% Senior Unsecured Notes, due March 15, 2013</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FivePointEightTwoZeroPercentSeniorUnsecuredNotesDueMarchFifteenTwoThousandThirteenMember_lbl" xml:lang="en-US">Five Point Eight Two Zero Percent Senior Unsecured Notes Due March Fifteen Two Thousand Thirteen [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FivePointEightTwoZeroPercentSeniorUnsecuredNotesDueMarchFifteenTwoThousandThirteenMember_lbl" xml:lang="en-US">5.820% Senior Unsecured Notes, Due March 15, 2013 [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FourPointSixZeroZeroPercentSeniorUnsecuredNotesDueJuneFifteenTwoThousandThirteenMember" xlink:label="cli_FourPointSixZeroZeroPercentSeniorUnsecuredNotesDueJuneFifteenTwoThousandThirteenMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FourPointSixZeroZeroPercentSeniorUnsecuredNotesDueJuneFifteenTwoThousandThirteenMember" xlink:to="cli_FourPointSixZeroZeroPercentSeniorUnsecuredNotesDueJuneFifteenTwoThousandThirteenMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FourPointSixZeroZeroPercentSeniorUnsecuredNotesDueJuneFifteenTwoThousandThirteenMember_lbl" xml:lang="en-US">4.600% Senior Unsecured Notes, due June 15, 2013</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FourPointSixZeroZeroPercentSeniorUnsecuredNotesDueJuneFifteenTwoThousandThirteenMember_lbl" xml:lang="en-US">Four Point Six Zero Zero Percent Senior Unsecured Notes Due June Fifteen Two Thousand Thirteen [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FourPointSixZeroZeroPercentSeniorUnsecuredNotesDueJuneFifteenTwoThousandThirteenMember_lbl" xml:lang="en-US">4.600% Senior Unsecured Notes, Due June 15, 2013 [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FivePointOneTwoFivePercentSeniorUnsecuredNotesDueFebruaryFifteenTwoThousandFourteenMember" xlink:label="cli_FivePointOneTwoFivePercentSeniorUnsecuredNotesDueFebruaryFifteenTwoThousandFourteenMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FivePointOneTwoFivePercentSeniorUnsecuredNotesDueFebruaryFifteenTwoThousandFourteenMember" xlink:to="cli_FivePointOneTwoFivePercentSeniorUnsecuredNotesDueFebruaryFifteenTwoThousandFourteenMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FivePointOneTwoFivePercentSeniorUnsecuredNotesDueFebruaryFifteenTwoThousandFourteenMember_lbl" xml:lang="en-US">5.125% Senior Unsecured Notes, due February 15, 2014</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FivePointOneTwoFivePercentSeniorUnsecuredNotesDueFebruaryFifteenTwoThousandFourteenMember_lbl" xml:lang="en-US">Five Point One Two Five Percent Senior Unsecured Notes Due February Fifteen Two Thousand Fourteen [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FivePointOneTwoFivePercentSeniorUnsecuredNotesDueFebruaryFifteenTwoThousandFourteenMember_lbl" xml:lang="en-US">5.125% Senior Unsecured Notes, Due February 15, 2014 [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FivePointOneTwoFivePercentSeniorUnsecuredNotesDueJanuaryFifteenTwoThousandFifteenMember" xlink:label="cli_FivePointOneTwoFivePercentSeniorUnsecuredNotesDueJanuaryFifteenTwoThousandFifteenMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FivePointOneTwoFivePercentSeniorUnsecuredNotesDueJanuaryFifteenTwoThousandFifteenMember" xlink:to="cli_FivePointOneTwoFivePercentSeniorUnsecuredNotesDueJanuaryFifteenTwoThousandFifteenMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FivePointOneTwoFivePercentSeniorUnsecuredNotesDueJanuaryFifteenTwoThousandFifteenMember_lbl" xml:lang="en-US">5.125% Senior Unsecured Notes, due January 15, 2015</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FivePointOneTwoFivePercentSeniorUnsecuredNotesDueJanuaryFifteenTwoThousandFifteenMember_lbl" xml:lang="en-US">Five Point One Two Five Percent Senior Unsecured Notes Due January Fifteen Two Thousand Fifteen [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FivePointOneTwoFivePercentSeniorUnsecuredNotesDueJanuaryFifteenTwoThousandFifteenMember_lbl" xml:lang="en-US">5.125% Senior Unsecured Notes, Due January 15, 2015 [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FivePointEightZeroZeroPercentSeniorUnsecuredNotesDueJanuaryFifteenTwoThousandSixteenMember" xlink:label="cli_FivePointEightZeroZeroPercentSeniorUnsecuredNotesDueJanuaryFifteenTwoThousandSixteenMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FivePointEightZeroZeroPercentSeniorUnsecuredNotesDueJanuaryFifteenTwoThousandSixteenMember" xlink:to="cli_FivePointEightZeroZeroPercentSeniorUnsecuredNotesDueJanuaryFifteenTwoThousandSixteenMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FivePointEightZeroZeroPercentSeniorUnsecuredNotesDueJanuaryFifteenTwoThousandSixteenMember_lbl" xml:lang="en-US">5.800% Senior Unsecured Notes, due January 15, 2016</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FivePointEightZeroZeroPercentSeniorUnsecuredNotesDueJanuaryFifteenTwoThousandSixteenMember_lbl" xml:lang="en-US">Five Point Eight Zero Zero Percent Senior Unsecured Notes Due January Fifteen Two Thousand Sixteen [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FivePointEightZeroZeroPercentSeniorUnsecuredNotesDueJanuaryFifteenTwoThousandSixteenMember_lbl" xml:lang="en-US">5.800% Senior Unsecured Notes, Due January 15, 2016 [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_SevenPointSevenFiveZeroPercentSeniorUnsecuredNotesDueAugustFifteenTwoThousandNineteenMember" xlink:label="cli_SevenPointSevenFiveZeroPercentSeniorUnsecuredNotesDueAugustFifteenTwoThousandNineteenMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_SevenPointSevenFiveZeroPercentSeniorUnsecuredNotesDueAugustFifteenTwoThousandNineteenMember" xlink:to="cli_SevenPointSevenFiveZeroPercentSeniorUnsecuredNotesDueAugustFifteenTwoThousandNineteenMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_SevenPointSevenFiveZeroPercentSeniorUnsecuredNotesDueAugustFifteenTwoThousandNineteenMember_lbl" xml:lang="en-US">7.750% Senior Unsecured Notes, due August 15, 2019</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_SevenPointSevenFiveZeroPercentSeniorUnsecuredNotesDueAugustFifteenTwoThousandNineteenMember_lbl" xml:lang="en-US">Seven Point Seven Five Zero Percent Senior Unsecured Notes Due August Fifteen Two Thousand Nineteen [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_SevenPointSevenFiveZeroPercentSeniorUnsecuredNotesDueAugustFifteenTwoThousandNineteenMember_lbl" xml:lang="en-US">7.750% Senior Unsecured Notes, Due August 15, 2019 [Member]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentInterestRateEffectivePercentage" xlink:label="us-gaap_DebtInstrumentInterestRateEffectivePercentage" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentInterestRateEffectivePercentage" xlink:to="us-gaap_DebtInstrumentInterestRateEffectivePercentage_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentInterestRateEffectivePercentage_lbl" xml:lang="en-US">Debt Instrument, Interest Rate, Effective Percentage</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtInstrumentInterestRateEffectivePercentage_lbl" xml:lang="en-US">Effective Rate</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DebtInstrumentInterestRateEffectivePercentage_lbl" xml:lang="en-US">Effective Interest Rate</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LineOfCreditFacilityTable" xlink:label="us-gaap_LineOfCreditFacilityTable" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityTable" xlink:to="us-gaap_LineOfCreditFacilityTable_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LineOfCreditFacilityTable_lbl" xml:lang="en-US">Line of Credit Facility [Table]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_PreviousCreditFacilityMember" xlink:label="cli_PreviousCreditFacilityMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_PreviousCreditFacilityMember" xlink:to="cli_PreviousCreditFacilityMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_PreviousCreditFacilityMember_lbl" xml:lang="en-US">Previous Credit Facility [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_PreviousCreditFacilityMember_lbl" xml:lang="en-US">Previous Credit Facility [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_PreviousCreditFacilityMember_lbl" xml:lang="en-US">Previous Credit Facility [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_MoneyMarketLoanMember" xlink:label="cli_MoneyMarketLoanMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_MoneyMarketLoanMember" xlink:to="cli_MoneyMarketLoanMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_MoneyMarketLoanMember_lbl" xml:lang="en-US">Money Market Loan [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_MoneyMarketLoanMember_lbl" xml:lang="en-US">Money Market Loan [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_MoneyMarketLoanMember_lbl" xml:lang="en-US">Money Market Loan [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_LineOfCreditFacilityByCategoryLineItems" xlink:label="cli_LineOfCreditFacilityByCategoryLineItems" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_LineOfCreditFacilityByCategoryLineItems" xlink:to="cli_LineOfCreditFacilityByCategoryLineItems_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_LineOfCreditFacilityByCategoryLineItems_lbl" xml:lang="en-US">Line Of Credit Facility By Category [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_LineOfCreditFacilityByCategoryLineItems_lbl" xml:lang="en-US">Line Of Credit Facility By Category [Line Items]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:to="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_lbl" xml:lang="en-US">Amount borrowed under the credit facility</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_lbl" xml:lang="en-US">Borrowing capacity under the credit facility</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_lbl" xml:lang="en-US">Borrowings expandable under the credit facility</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_LineOfCreditFacilityExpandableMaximumBorrowingCapacity" xlink:label="cli_LineOfCreditFacilityExpandableMaximumBorrowingCapacity" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_LineOfCreditFacilityExpandableMaximumBorrowingCapacity" xlink:to="cli_LineOfCreditFacilityExpandableMaximumBorrowingCapacity_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_LineOfCreditFacilityExpandableMaximumBorrowingCapacity_lbl" xml:lang="en-US">Line Of Credit Facility Expandable Maximum Borrowing Capacity</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_LineOfCreditFacilityExpandableMaximumBorrowingCapacity_lbl" xml:lang="en-US">Line Of Credit Facility Expandable Maximum Borrowing Capacity</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_LineOfCreditFacilityExpandableMaximumBorrowingCapacity_lbl" xml:lang="en-US">Expandable borrowing capacity under the credit facility</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_LineOfCreditFacilityExtensionPeriod" xlink:label="cli_LineOfCreditFacilityExtensionPeriod" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_LineOfCreditFacilityExtensionPeriod" xlink:to="cli_LineOfCreditFacilityExtensionPeriod_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_LineOfCreditFacilityExtensionPeriod_lbl" xml:lang="en-US">Line Of Credit Facility Extension Period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_LineOfCreditFacilityExtensionPeriod_lbl" xml:lang="en-US">Line Of Credit Facility Extension Period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_LineOfCreditFacilityExtensionPeriod_lbl" xml:lang="en-US">Credit facility, extension period</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_LineOfCreditFacilityBasisPointFacilityFee" xlink:label="cli_LineOfCreditFacilityBasisPointFacilityFee" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_LineOfCreditFacilityBasisPointFacilityFee" xlink:to="cli_LineOfCreditFacilityBasisPointFacilityFee_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_LineOfCreditFacilityBasisPointFacilityFee_lbl" xml:lang="en-US">Line Of Credit Facility Basis Point Facility Fee</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_LineOfCreditFacilityBasisPointFacilityFee_lbl" xml:lang="en-US">Line Of Credit Facility Basis Point Facility Fee</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_LineOfCreditFacilityBasisPointFacilityFee_lbl" xml:lang="en-US">Credit facility fee, basis points</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_LineOfCreditFacilityLendingInstitutionsNumber" xlink:label="cli_LineOfCreditFacilityLendingInstitutionsNumber" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_LineOfCreditFacilityLendingInstitutionsNumber" xlink:to="cli_LineOfCreditFacilityLendingInstitutionsNumber_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_LineOfCreditFacilityLendingInstitutionsNumber_lbl" xml:lang="en-US">Line of Credit Facility, Lending Institutions Number</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_LineOfCreditFacilityLendingInstitutionsNumber_lbl" xml:lang="en-US">Line of Credit Facility, Lending Institutions Number</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_LineOfCreditFacilityLendingInstitutionsNumber_lbl" xml:lang="en-US">Number of lending institutions</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LineOfCreditFacilityExpirationDate" xlink:label="us-gaap_LineOfCreditFacilityExpirationDate" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityExpirationDate" xlink:to="us-gaap_LineOfCreditFacilityExpirationDate_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LineOfCreditFacilityExpirationDate_lbl" xml:lang="en-US">Line of Credit Facility, Expiration Date</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LineOfCreditFacilityExpirationDate_lbl" xml:lang="en-US">Credit facility mature date</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LineOfCreditFacilityInterestRateDescription" xlink:label="us-gaap_LineOfCreditFacilityInterestRateDescription" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityInterestRateDescription" xlink:to="us-gaap_LineOfCreditFacilityInterestRateDescription_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LineOfCreditFacilityInterestRateDescription_lbl" xml:lang="en-US">Line of Credit Facility, Interest Rate Description</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LineOfCreditFacilityInterestRateDescription_lbl" xml:lang="en-US">Interest rate on outstanding borrowings</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_LineOfCreditFacilityBidFeatureCurrentBorrowingCapacity" xlink:label="cli_LineOfCreditFacilityBidFeatureCurrentBorrowingCapacity" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_LineOfCreditFacilityBidFeatureCurrentBorrowingCapacity" xlink:to="cli_LineOfCreditFacilityBidFeatureCurrentBorrowingCapacity_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_LineOfCreditFacilityBidFeatureCurrentBorrowingCapacity_lbl" xml:lang="en-US">Maximum borrowing amount under the line of credit facility competitive bid feature.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_LineOfCreditFacilityBidFeatureCurrentBorrowingCapacity_lbl" xml:lang="en-US">Line Of Credit Facility Bid Feature Current Borrowing Capacity</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_LineOfCreditFacilityBidFeatureCurrentBorrowingCapacity_lbl" xml:lang="en-US">Line of credit facility, bid feature, current borrowing capacity</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LineOfCreditFacilityCovenantTerms" xlink:label="us-gaap_LineOfCreditFacilityCovenantTerms" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityCovenantTerms" xlink:to="us-gaap_LineOfCreditFacilityCovenantTerms_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LineOfCreditFacilityCovenantTerms_lbl" xml:lang="en-US">Line of Credit Facility, Covenant Terms</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_LineOfCreditFacilityCovenantTerms_lbl" xml:lang="en-US">Terms of the unsecured facility</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_LineOfCreditFacilityMaturityPeriod" xlink:label="cli_LineOfCreditFacilityMaturityPeriod" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_LineOfCreditFacilityMaturityPeriod" xlink:to="cli_LineOfCreditFacilityMaturityPeriod_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_LineOfCreditFacilityMaturityPeriod_lbl" xml:lang="en-US">Line of Credit Facility, Maturity Period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_LineOfCreditFacilityMaturityPeriod_lbl" xml:lang="en-US">Line of Credit Facility, Maturity Period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_LineOfCreditFacilityMaturityPeriod_lbl" xml:lang="en-US">Maturity period of the unsecured borrowing</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfGuaranteeObligationsTable" xlink:label="us-gaap_ScheduleOfGuaranteeObligationsTable" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfGuaranteeObligationsTable" xlink:to="us-gaap_ScheduleOfGuaranteeObligationsTable_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfGuaranteeObligationsTable_lbl" xml:lang="en-US">Schedule of Guarantor Obligations [Table]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PaymentAndPerformanceRiskCreditRatingAxis" xlink:label="us-gaap_PaymentAndPerformanceRiskCreditRatingAxis" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentAndPerformanceRiskCreditRatingAxis" xlink:to="us-gaap_PaymentAndPerformanceRiskCreditRatingAxis_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PaymentAndPerformanceRiskCreditRatingAxis_lbl" xml:lang="en-US">Payment and Performance Risk (Credit Rating) [Axis]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CreditRatingDomain" xlink:label="us-gaap_CreditRatingDomain" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CreditRatingDomain" xlink:to="us-gaap_CreditRatingDomain_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CreditRatingDomain_lbl" xml:lang="en-US">Credit Rating [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CreditRatingDomain_lbl" xml:lang="en-US">Credit Rating [Domain]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_NoRatingsOrLessThanBbbMinusBaaThreeMember" xlink:label="cli_NoRatingsOrLessThanBbbMinusBaaThreeMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_NoRatingsOrLessThanBbbMinusBaaThreeMember" xlink:to="cli_NoRatingsOrLessThanBbbMinusBaaThreeMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_NoRatingsOrLessThanBbbMinusBaaThreeMember_lbl" xml:lang="en-US">No Ratings Or Less Than BBB Minus, Baa Three [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_NoRatingsOrLessThanBbbMinusBaaThreeMember_lbl" xml:lang="en-US">No Ratings Or Less Than Bbb Minus Baa Three [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_NoRatingsOrLessThanBbbMinusBaaThreeMember_lbl" xml:lang="en-US">No Ratings Or Less Than BBB-/Baa3 [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_BbbMinusOrBaaThreeMember" xlink:label="cli_BbbMinusOrBaaThreeMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_BbbMinusOrBaaThreeMember" xlink:to="cli_BbbMinusOrBaaThreeMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_BbbMinusOrBaaThreeMember_lbl" xml:lang="en-US">BBB Minus Or Baa Three [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_BbbMinusOrBaaThreeMember_lbl" xml:lang="en-US">Bbb Minus Or Baa Three [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_BbbMinusOrBaaThreeMember_lbl" xml:lang="en-US">BBB- Or Baa3 [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_BbbOrBaaTwoCurrentMember" xlink:label="cli_BbbOrBaaTwoCurrentMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_BbbOrBaaTwoCurrentMember" xlink:to="cli_BbbOrBaaTwoCurrentMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_BbbOrBaaTwoCurrentMember_lbl" xml:lang="en-US">BBB Or Baa Two Current [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_BbbOrBaaTwoCurrentMember_lbl" xml:lang="en-US">Bbb Or Baa Two Current [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_BbbOrBaaTwoCurrentMember_lbl" xml:lang="en-US">BBB Or Baa2 (Current) [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_BbbPlusOrBaaOneMember" xlink:label="cli_BbbPlusOrBaaOneMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_BbbPlusOrBaaOneMember" xlink:to="cli_BbbPlusOrBaaOneMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_BbbPlusOrBaaOneMember_lbl" xml:lang="en-US">BBB Plus Or Baa One [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_BbbPlusOrBaaOneMember_lbl" xml:lang="en-US">Bbb Plus Or Baa One [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_BbbPlusOrBaaOneMember_lbl" xml:lang="en-US">BBB+ Or Baa1 [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_MinusOrThreeOrHigherMember" xlink:label="cli_MinusOrThreeOrHigherMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_MinusOrThreeOrHigherMember" xlink:to="cli_MinusOrThreeOrHigherMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_MinusOrThreeOrHigherMember_lbl" xml:lang="en-US">A Minus Or A Three Or Higher [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_MinusOrThreeOrHigherMember_lbl" xml:lang="en-US">Minus Or Three Or Higher [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_MinusOrThreeOrHigherMember_lbl" xml:lang="en-US">A- Or A3 Or Higher [Member]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GuaranteeObligationsLineItems" xlink:label="us-gaap_GuaranteeObligationsLineItems" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GuaranteeObligationsLineItems" xlink:to="us-gaap_GuaranteeObligationsLineItems_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_GuaranteeObligationsLineItems_lbl" xml:lang="en-US">Guarantor Obligations [Line Items]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentCreditRating" xlink:label="us-gaap_DebtInstrumentCreditRating" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentCreditRating" xlink:to="us-gaap_DebtInstrumentCreditRating_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentCreditRating_lbl" xml:lang="en-US">Debt Instrument, Credit Rating</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtInstrumentCreditRating_lbl" xml:lang="en-US">Unsecured Debt Ratings</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DebtInstrumentCreditRating_lbl" xml:lang="en-US">Unsecured debt ratings</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_LineOfCreditFacilityInterestRateSpreadOverLibor" xlink:label="cli_LineOfCreditFacilityInterestRateSpreadOverLibor" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_LineOfCreditFacilityInterestRateSpreadOverLibor" xlink:to="cli_LineOfCreditFacilityInterestRateSpreadOverLibor_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_LineOfCreditFacilityInterestRateSpreadOverLibor_lbl" xml:lang="en-US">Line of Credit Facility, Interest Rate Spread Over LIBOR</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_LineOfCreditFacilityInterestRateSpreadOverLibor_lbl" xml:lang="en-US">Line of Credit Facility, Interest Rate Spread Over LIBOR</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_LineOfCreditFacilityInterestRateSpreadOverLibor_lbl" xml:lang="en-US">Interest Rate - Applicable Basis Points Above LIBOR</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_LineOfCreditFacilityBasisPointsOfFacilityFees" xlink:label="cli_LineOfCreditFacilityBasisPointsOfFacilityFees" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_LineOfCreditFacilityBasisPointsOfFacilityFees" xlink:to="cli_LineOfCreditFacilityBasisPointsOfFacilityFees_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_LineOfCreditFacilityBasisPointsOfFacilityFees_lbl" xml:lang="en-US">Line of Credit Facility, Basis Points of Facility Fees</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_LineOfCreditFacilityBasisPointsOfFacilityFees_lbl" xml:lang="en-US">Line of Credit Facility, Basis Points of Facility Fees</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_LineOfCreditFacilityBasisPointsOfFacilityFees_lbl" xml:lang="en-US">Facility fee basis points</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="cli_LineOfCreditFacilityBasisPointsOfFacilityFees_lbl" xml:lang="en-US">Facility Fee Basis Points</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ExtinguishmentOfDebtAxis" xlink:label="us-gaap_ExtinguishmentOfDebtAxis" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ExtinguishmentOfDebtAxis" xlink:to="us-gaap_ExtinguishmentOfDebtAxis_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ExtinguishmentOfDebtAxis_lbl" xml:lang="en-US">Extinguishment of Debt [Axis]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ExtinguishmentOfDebtTypeDomain" xlink:label="us-gaap_ExtinguishmentOfDebtTypeDomain" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ExtinguishmentOfDebtTypeDomain" xlink:to="us-gaap_ExtinguishmentOfDebtTypeDomain_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ExtinguishmentOfDebtTypeDomain_lbl" xml:lang="en-US">Extinguishment Of Debt Type [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ExtinguishmentOfDebtTypeDomain_lbl" xml:lang="en-US">Extinguishment of Debt, Type [Domain]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_RevolvingCreditFacilityAndOtherVariableRateMortgageDebtMember" xlink:label="cli_RevolvingCreditFacilityAndOtherVariableRateMortgageDebtMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_RevolvingCreditFacilityAndOtherVariableRateMortgageDebtMember" xlink:to="cli_RevolvingCreditFacilityAndOtherVariableRateMortgageDebtMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_RevolvingCreditFacilityAndOtherVariableRateMortgageDebtMember_lbl" xml:lang="en-US">Revolving Credit Facility and Other Variable Rate Mortgage Debt [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_RevolvingCreditFacilityAndOtherVariableRateMortgageDebtMember_lbl" xml:lang="en-US">Revolving Credit Facility And Other Variable Rate Mortgage Debt [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_RevolvingCreditFacilityAndOtherVariableRateMortgageDebtMember_lbl" xml:lang="en-US">Revolving Credit Facility Borrowing And Other Variable Rate Mortgage Debt [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FixedRateDebtAndOtherObligationsMember" xlink:label="cli_FixedRateDebtAndOtherObligationsMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FixedRateDebtAndOtherObligationsMember" xlink:to="cli_FixedRateDebtAndOtherObligationsMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FixedRateDebtAndOtherObligationsMember_lbl" xml:lang="en-US">Fixed Rate Debt and Other Obligations [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FixedRateDebtAndOtherObligationsMember_lbl" xml:lang="en-US">Fixed Rate Debt And Other Obligations [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FixedRateDebtAndOtherObligationsMember_lbl" xml:lang="en-US">Fixed Rate Debt And Other Obligations [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_MortgagesLoansPayableAndOtherObligationsLineItems" xlink:label="cli_MortgagesLoansPayableAndOtherObligationsLineItems" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_MortgagesLoansPayableAndOtherObligationsLineItems" xlink:to="cli_MortgagesLoansPayableAndOtherObligationsLineItems_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_MortgagesLoansPayableAndOtherObligationsLineItems_lbl" xml:lang="en-US">Mortgages, Loans Payable And Other Obligations [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_MortgagesLoansPayableAndOtherObligationsLineItems_lbl" xml:lang="en-US">Mortgages, Loans Payable And Other Obligations [Line Items]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_NumberOfPropertiesWithEncumberedCompanyMortgages" xlink:label="cli_NumberOfPropertiesWithEncumberedCompanyMortgages" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_NumberOfPropertiesWithEncumberedCompanyMortgages" xlink:to="cli_NumberOfPropertiesWithEncumberedCompanyMortgages_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_NumberOfPropertiesWithEncumberedCompanyMortgages_lbl" xml:lang="en-US">Number Of Properties With Encumbered Company Mortgages</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_NumberOfPropertiesWithEncumberedCompanyMortgages_lbl" xml:lang="en-US">Number of properties with encumbered company mortgages</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_MortgagePropertyCarryingValue" xlink:label="cli_MortgagePropertyCarryingValue" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_MortgagePropertyCarryingValue" xlink:to="cli_MortgagePropertyCarryingValue_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_MortgagePropertyCarryingValue_lbl" xml:lang="en-US">Carrying Value of the Mortgaged Property</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_MortgagePropertyCarryingValue_lbl" xml:lang="en-US">Mortgage Property, Carrying Value</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_MortgagePropertyCarryingValue_lbl" xml:lang="en-US">Book value of the encumbered property</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InterestPaid" xlink:label="us-gaap_InterestPaid" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestPaid" xlink:to="us-gaap_InterestPaid_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InterestPaid_lbl" xml:lang="en-US">Interest Paid</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_InterestPaid_lbl" xml:lang="en-US">Cash paid for interest</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_InterestPaid_lbl" xml:lang="en-US">Interest Paid, Total</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_InterestCostsCapitalized" xlink:label="us-gaap_InterestCostsCapitalized" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestCostsCapitalized" xlink:to="us-gaap_InterestCostsCapitalized_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_InterestCostsCapitalized_lbl" xml:lang="en-US">Interest Costs, Capitalized During Period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_InterestCostsCapitalized_lbl" xml:lang="en-US">Interest capitalized</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebt" xlink:label="us-gaap_LongTermDebt" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebt" xlink:to="us-gaap_LongTermDebt_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongTermDebt_lbl" xml:lang="en-US">Long-term Debt</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LongTermDebt_lbl" xml:lang="en-US">Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_LongTermDebt_lbl" xml:lang="en-US">Total/Weighted Average</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_LongTermDebt_lbl" xml:lang="en-US">Total indebtedness</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongtermDebtWeightedAverageInterestRate" xlink:label="us-gaap_LongtermDebtWeightedAverageInterestRate" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongtermDebtWeightedAverageInterestRate" xlink:to="us-gaap_LongtermDebtWeightedAverageInterestRate_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongtermDebtWeightedAverageInterestRate_lbl" xml:lang="en-US">Long-term Debt, Weighted Average Interest Rate</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LongtermDebtWeightedAverageInterestRate_lbl" xml:lang="en-US">Total indebtedness, weighted average interest rate</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_DebtInstrumentByPropertyNameTable" xlink:label="cli_DebtInstrumentByPropertyNameTable" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_DebtInstrumentByPropertyNameTable" xlink:to="cli_DebtInstrumentByPropertyNameTable_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_DebtInstrumentByPropertyNameTable_lbl" xml:lang="en-US">Debt Instrument by Property Name [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_DebtInstrumentByPropertyNameTable_lbl" xml:lang="en-US">Debt Instrument by Property Name [Table]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_InterestRateResetAxis" xlink:label="cli_InterestRateResetAxis" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_InterestRateResetAxis" xlink:to="cli_InterestRateResetAxis_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_InterestRateResetAxis_lbl" xml:lang="en-US">Interest Rate Reset [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_InterestRateResetAxis_lbl" xml:lang="en-US">Interest Rate Reset [Axis]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_InterestRateResetDomain" xlink:label="cli_InterestRateResetDomain" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_InterestRateResetDomain" xlink:to="cli_InterestRateResetDomain_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_InterestRateResetDomain_lbl" xml:lang="en-US">Interest Rate Reset [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_InterestRateResetDomain_lbl" xml:lang="en-US">Interest Rate Reset [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_InterestRateResetDomain_lbl" xml:lang="en-US">Interest Rate Reset [Domain]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_CouponInterestRateResetOneMember" xlink:label="cli_CouponInterestRateResetOneMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_CouponInterestRateResetOneMember" xlink:to="cli_CouponInterestRateResetOneMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_CouponInterestRateResetOneMember_lbl" xml:lang="en-US">Coupon Interest Rate Reset One [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_CouponInterestRateResetOneMember_lbl" xml:lang="en-US">Coupon Interest Rate Reset One [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_CouponInterestRateResetOneMember_lbl" xml:lang="en-US">Coupon Interest Rate Reset One [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_CouponInterestRateResetTwoMember" xlink:label="cli_CouponInterestRateResetTwoMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_CouponInterestRateResetTwoMember" xlink:to="cli_CouponInterestRateResetTwoMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_CouponInterestRateResetTwoMember_lbl" xml:lang="en-US">Coupon Interest Rate Reset Two [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_CouponInterestRateResetTwoMember_lbl" xml:lang="en-US">Coupon Interest Rate Reset Two [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_CouponInterestRateResetTwoMember_lbl" xml:lang="en-US">Coupon Interest Rate Reset Two [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_LongTermDebtPropertyNameAxis" xlink:label="cli_LongTermDebtPropertyNameAxis" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_LongTermDebtPropertyNameAxis" xlink:to="cli_LongTermDebtPropertyNameAxis_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_LongTermDebtPropertyNameAxis_lbl" xml:lang="en-US">Long Term Debt, Property Name [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_LongTermDebtPropertyNameAxis_lbl" xml:lang="en-US">Long Term Debt, Property Name [Axis]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_LongTermDebtPropertyNameDomain" xlink:label="cli_LongTermDebtPropertyNameDomain" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_LongTermDebtPropertyNameDomain" xlink:to="cli_LongTermDebtPropertyNameDomain_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_LongTermDebtPropertyNameDomain_lbl" xml:lang="en-US">Long Term Debt, Property Name [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_LongTermDebtPropertyNameDomain_lbl" xml:lang="en-US">Long Term Debt Property Name [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_LongTermDebtPropertyNameDomain_lbl" xml:lang="en-US">Long Term Debt, Property Name [Domain]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwoThousandTwoHundredRenaissanceBoulevardMember" xlink:label="cli_TwoThousandTwoHundredRenaissanceBoulevardMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwoThousandTwoHundredRenaissanceBoulevardMember" xlink:to="cli_TwoThousandTwoHundredRenaissanceBoulevardMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwoThousandTwoHundredRenaissanceBoulevardMember_lbl" xml:lang="en-US">2200 Renaissance Boulevard</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwoThousandTwoHundredRenaissanceBoulevardMember_lbl" xml:lang="en-US">Two Thousand Two Hundred Renaissance Boulevard [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwoThousandTwoHundredRenaissanceBoulevardMember_lbl" xml:lang="en-US">2200 Renaissance Boulevard [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneGrandeCommonsMember" xlink:label="cli_OneGrandeCommonsMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneGrandeCommonsMember" xlink:to="cli_OneGrandeCommonsMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneGrandeCommonsMember_lbl" xml:lang="en-US">One Grande Commons [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneGrandeCommonsMember_lbl" xml:lang="en-US">One Grande Commons [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneGrandeCommonsMember_lbl" xml:lang="en-US">One Grande Commons [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_SoundviewPlazaMember" xlink:label="cli_SoundviewPlazaMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_SoundviewPlazaMember" xlink:to="cli_SoundviewPlazaMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_SoundviewPlazaMember_lbl" xml:lang="en-US">Soundview Plaza</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_SoundviewPlazaMember_lbl" xml:lang="en-US">Soundview Plaza [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_SoundviewPlazaMember_lbl" xml:lang="en-US">Soundview Plaza [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_NineThousandTwoHundredEdmonstonRoadMember" xlink:label="cli_NineThousandTwoHundredEdmonstonRoadMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_NineThousandTwoHundredEdmonstonRoadMember" xlink:to="cli_NineThousandTwoHundredEdmonstonRoadMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_NineThousandTwoHundredEdmonstonRoadMember_lbl" xml:lang="en-US">Nine Thousand Two Hundred Edmonston Road [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_NineThousandTwoHundredEdmonstonRoadMember_lbl" xml:lang="en-US">Nine Thousand Two Hundred Edmonston Road [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_NineThousandTwoHundredEdmonstonRoadMember_lbl" xml:lang="en-US">9200 Edmonston Road [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_SixThousandThreeHundredFiveIvyLaneMember" xlink:label="cli_SixThousandThreeHundredFiveIvyLaneMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_SixThousandThreeHundredFiveIvyLaneMember" xlink:to="cli_SixThousandThreeHundredFiveIvyLaneMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_SixThousandThreeHundredFiveIvyLaneMember_lbl" xml:lang="en-US">Six Thousand Three Hundred Five Ivy Lane [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_SixThousandThreeHundredFiveIvyLaneMember_lbl" xml:lang="en-US">Six Thousand Three Hundred Five Ivy Lane [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_SixThousandThreeHundredFiveIvyLaneMember_lbl" xml:lang="en-US">6305 Ivy Lane [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ThreeHundredNinetyFiveWestPassaicMember" xlink:label="cli_ThreeHundredNinetyFiveWestPassaicMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ThreeHundredNinetyFiveWestPassaicMember" xlink:to="cli_ThreeHundredNinetyFiveWestPassaicMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ThreeHundredNinetyFiveWestPassaicMember_lbl" xml:lang="en-US">Three Hundred Ninety Five West Passaic [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ThreeHundredNinetyFiveWestPassaicMember_lbl" xml:lang="en-US">Three Hundred Ninety Five West Passaic [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ThreeHundredNinetyFiveWestPassaicMember_lbl" xml:lang="en-US">395 West Passaic [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_SixThousandThreeHundredOneIvyLaneMember" xlink:label="cli_SixThousandThreeHundredOneIvyLaneMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_SixThousandThreeHundredOneIvyLaneMember" xlink:to="cli_SixThousandThreeHundredOneIvyLaneMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_SixThousandThreeHundredOneIvyLaneMember_lbl" xml:lang="en-US">Six Thousand Three Hundred One Ivy Lane [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_SixThousandThreeHundredOneIvyLaneMember_lbl" xml:lang="en-US">Six Thousand Three Hundred One Ivy Lane [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_SixThousandThreeHundredOneIvyLaneMember_lbl" xml:lang="en-US">6301 Ivy Lane [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ThirtyFiveWaterviewBoulevardMember" xlink:label="cli_ThirtyFiveWaterviewBoulevardMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ThirtyFiveWaterviewBoulevardMember" xlink:to="cli_ThirtyFiveWaterviewBoulevardMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ThirtyFiveWaterviewBoulevardMember_lbl" xml:lang="en-US">Thirty Five Waterview Boulevard [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ThirtyFiveWaterviewBoulevardMember_lbl" xml:lang="en-US">Thirty Five Waterview Boulevard [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ThirtyFiveWaterviewBoulevardMember_lbl" xml:lang="en-US">35 Waterview Boulevard [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_SixBeckerEightyFiveLivingstonSeventyFiveLivingstonAndTwentyWaterviewMember" xlink:label="cli_SixBeckerEightyFiveLivingstonSeventyFiveLivingstonAndTwentyWaterviewMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_SixBeckerEightyFiveLivingstonSeventyFiveLivingstonAndTwentyWaterviewMember" xlink:to="cli_SixBeckerEightyFiveLivingstonSeventyFiveLivingstonAndTwentyWaterviewMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_SixBeckerEightyFiveLivingstonSeventyFiveLivingstonAndTwentyWaterviewMember_lbl" xml:lang="en-US">6 Becker, 85 Livingston, 75 Livingston &amp; 20 Waterview</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_SixBeckerEightyFiveLivingstonSeventyFiveLivingstonAndTwentyWaterviewMember_lbl" xml:lang="en-US">Six Becker Eighty Five Livingston Seventy Five Livingston And Twenty Waterview [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_SixBeckerEightyFiveLivingstonSeventyFiveLivingstonAndTwentyWaterviewMember_lbl" xml:lang="en-US">6 Becker, 85 Livingston, 75 Livingston And 20 Waterview [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FourSylvanMember" xlink:label="cli_FourSylvanMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FourSylvanMember" xlink:to="cli_FourSylvanMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FourSylvanMember_lbl" xml:lang="en-US">4 Sylvan</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FourSylvanMember_lbl" xml:lang="en-US">Four Sylvan [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FourSylvanMember_lbl" xml:lang="en-US">4 Sylvan [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TenIndependenceMember" xlink:label="cli_TenIndependenceMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TenIndependenceMember" xlink:to="cli_TenIndependenceMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TenIndependenceMember_lbl" xml:lang="en-US">10 Independence</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TenIndependenceMember_lbl" xml:lang="en-US">Ten Independence [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TenIndependenceMember_lbl" xml:lang="en-US">10 Independence [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FourBeckerMember" xlink:label="cli_FourBeckerMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FourBeckerMember" xlink:to="cli_FourBeckerMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FourBeckerMember_lbl" xml:lang="en-US">4 Becker</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FourBeckerMember_lbl" xml:lang="en-US">Four Becker [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FourBeckerMember_lbl" xml:lang="en-US">4 Becker [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FiveBeckerMember" xlink:label="cli_FiveBeckerMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FiveBeckerMember" xlink:to="cli_FiveBeckerMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FiveBeckerMember_lbl" xml:lang="en-US">5 Becker</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FiveBeckerMember_lbl" xml:lang="en-US">Five Becker [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FiveBeckerMember_lbl" xml:lang="en-US">5 Becker [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwoHundredTenClayMember" xlink:label="cli_TwoHundredTenClayMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwoHundredTenClayMember" xlink:to="cli_TwoHundredTenClayMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwoHundredTenClayMember_lbl" xml:lang="en-US">Two Hundred Ten Clay [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwoHundredTenClayMember_lbl" xml:lang="en-US">Two Hundred Ten Clay [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwoHundredTenClayMember_lbl" xml:lang="en-US">210 Clay [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FiftyOneImcloneMember" xlink:label="cli_FiftyOneImcloneMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FiftyOneImcloneMember" xlink:to="cli_FiftyOneImcloneMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FiftyOneImcloneMember_lbl" xml:lang="en-US">51 Imclone</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FiftyOneImcloneMember_lbl" xml:lang="en-US">Fifty One Imclone [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FiftyOneImcloneMember_lbl" xml:lang="en-US">51 Imclone [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_VariousMember" xlink:label="cli_VariousMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_VariousMember" xlink:to="cli_VariousMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_VariousMember_lbl" xml:lang="en-US">Various Member</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_VariousMember_lbl" xml:lang="en-US">Various [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_VariousMember_lbl" xml:lang="en-US">Various [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwentyThreeMainStreetMember" xlink:label="cli_TwentyThreeMainStreetMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwentyThreeMainStreetMember" xlink:to="cli_TwentyThreeMainStreetMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwentyThreeMainStreetMember_lbl" xml:lang="en-US">Twenty Three Main Street [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwentyThreeMainStreetMember_lbl" xml:lang="en-US">Twenty Three Main Street [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwentyThreeMainStreetMember_lbl" xml:lang="en-US">23 Main Street [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_HarborsidePlazaFiveMember" xlink:label="cli_HarborsidePlazaFiveMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_HarborsidePlazaFiveMember" xlink:to="cli_HarborsidePlazaFiveMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_HarborsidePlazaFiveMember_lbl" xml:lang="en-US">Harborside Plaza 5</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_HarborsidePlazaFiveMember_lbl" xml:lang="en-US">Harborside Plaza Five [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_HarborsidePlazaFiveMember_lbl" xml:lang="en-US">Harborside Plaza 5 [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneHundredWalnutAvenueMember" xlink:label="cli_OneHundredWalnutAvenueMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneHundredWalnutAvenueMember" xlink:to="cli_OneHundredWalnutAvenueMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneHundredWalnutAvenueMember_lbl" xml:lang="en-US">100 Walnut Avenue</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneHundredWalnutAvenueMember_lbl" xml:lang="en-US">One Hundred Walnut Avenue [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneHundredWalnutAvenueMember_lbl" xml:lang="en-US">100 Walnut Avenue [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneRiverCenterMember" xlink:label="cli_OneRiverCenterMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneRiverCenterMember" xlink:to="cli_OneRiverCenterMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneRiverCenterMember_lbl" xml:lang="en-US">One River Center</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneRiverCenterMember_lbl" xml:lang="en-US">One River Center [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneRiverCenterMember_lbl" xml:lang="en-US">One River Center [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FiveHundredEightyOneMainStreetMember" xlink:label="cli_FiveHundredEightyOneMainStreetMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FiveHundredEightyOneMainStreetMember" xlink:to="cli_FiveHundredEightyOneMainStreetMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FiveHundredEightyOneMainStreetMember_lbl" xml:lang="en-US">Five Hundred Eighty One Main Street [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FiveHundredEightyOneMainStreetMember_lbl" xml:lang="en-US">Five Hundred Eighty One Main Street [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FiveHundredEightyOneMainStreetMember_lbl" xml:lang="en-US">581 Main Street [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_SecuredDebtNameOfProperty" xlink:label="cli_SecuredDebtNameOfProperty" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_SecuredDebtNameOfProperty" xlink:to="cli_SecuredDebtNameOfProperty_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_SecuredDebtNameOfProperty_lbl" xml:lang="en-US">Secured Debt, Name of the Property</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_SecuredDebtNameOfProperty_lbl" xml:lang="en-US">Secured Debt, Name of the Property</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_SecuredDebtNameOfProperty_lbl" xml:lang="en-US">Property Name</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_SecuredDebtLendingInstitution" xlink:label="cli_SecuredDebtLendingInstitution" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_SecuredDebtLendingInstitution" xlink:to="cli_SecuredDebtLendingInstitution_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_SecuredDebtLendingInstitution_lbl" xml:lang="en-US">Secured Debt, Lending Institution</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_SecuredDebtLendingInstitution_lbl" xml:lang="en-US">Secured Debt, Lending Institution</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_SecuredDebtLendingInstitution_lbl" xml:lang="en-US">Lender</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_LiborInterestRate" xlink:label="cli_LiborInterestRate" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_LiborInterestRate" xlink:to="cli_LiborInterestRate_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_LiborInterestRate_lbl" xml:lang="en-US">Libor Interest Rate</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_LiborInterestRate_lbl" xml:lang="en-US">Libor Interest Rate</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_LiborInterestRate_lbl" xml:lang="en-US">LIBOR</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_EffectiveInterestRateResetPeriod" xlink:label="cli_EffectiveInterestRateResetPeriod" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_EffectiveInterestRateResetPeriod" xlink:to="cli_EffectiveInterestRateResetPeriod_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_EffectiveInterestRateResetPeriod_lbl" xml:lang="en-US">Effective Interest Rate Reset Period.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_EffectiveInterestRateResetPeriod_lbl" xml:lang="en-US">Effective Interest Rate Reset Period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_EffectiveInterestRateResetPeriod_lbl" xml:lang="en-US">Interest rate will be reset after the end of period (in years)</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_IncrementalBasisPointsOverEffectiveInterestRate" xlink:label="cli_IncrementalBasisPointsOverEffectiveInterestRate" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_IncrementalBasisPointsOverEffectiveInterestRate" xlink:to="cli_IncrementalBasisPointsOverEffectiveInterestRate_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_IncrementalBasisPointsOverEffectiveInterestRate_lbl" xml:lang="en-US">Incremental Basis Points over Effective Interest Rate</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_IncrementalBasisPointsOverEffectiveInterestRate_lbl" xml:lang="en-US">Incremental Basis Points over Effective Interest Rate</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_IncrementalBasisPointsOverEffectiveInterestRate_lbl" xml:lang="en-US">Basis points of the interest rate at the reset period</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TreasuryYieldPeriod" xlink:label="cli_TreasuryYieldPeriod" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TreasuryYieldPeriod" xlink:to="cli_TreasuryYieldPeriod_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TreasuryYieldPeriod_lbl" xml:lang="en-US">Treasury Yield Period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TreasuryYieldPeriod_lbl" xml:lang="en-US">Treasury Yield Period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TreasuryYieldPeriod_lbl" xml:lang="en-US">Treasury yield period, in years</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_CouponInterestResetPeriod" xlink:label="cli_CouponInterestResetPeriod" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_CouponInterestResetPeriod" xlink:to="cli_CouponInterestResetPeriod_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_CouponInterestResetPeriod_lbl" xml:lang="en-US">Coupon Interest Reset Period.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_CouponInterestResetPeriod_lbl" xml:lang="en-US">Coupon Interest Reset Period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_CouponInterestResetPeriod_lbl" xml:lang="en-US">Number of days prior to reset date that interest rate will be reset</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_DebtDiscountPremiumFutureAmortizationYearOne" xlink:label="cli_DebtDiscountPremiumFutureAmortizationYearOne" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_DebtDiscountPremiumFutureAmortizationYearOne" xlink:to="cli_DebtDiscountPremiumFutureAmortizationYearOne_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_DebtDiscountPremiumFutureAmortizationYearOne_lbl" xml:lang="en-US">Debt Discount Premium Future Amortization Year One</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_DebtDiscountPremiumFutureAmortizationYearOne_lbl" xml:lang="en-US">Debt Discount Premium Future Amortization Year One</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_DebtDiscountPremiumFutureAmortizationYearOne_lbl" xml:lang="en-US">Scheduled Amortization, 2012</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_DebtDiscountPremiumFutureAmortizationYearTwo" xlink:label="cli_DebtDiscountPremiumFutureAmortizationYearTwo" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_DebtDiscountPremiumFutureAmortizationYearTwo" xlink:to="cli_DebtDiscountPremiumFutureAmortizationYearTwo_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_DebtDiscountPremiumFutureAmortizationYearTwo_lbl" xml:lang="en-US">Debt Discount Premium Future Amortization Year Two</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_DebtDiscountPremiumFutureAmortizationYearTwo_lbl" xml:lang="en-US">Debt Discount Premium Future Amortization Year Two</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_DebtDiscountPremiumFutureAmortizationYearTwo_lbl" xml:lang="en-US">Scheduled Amortization, 2013</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_DebtDiscountPremiumFutureAmortizationYearThree" xlink:label="cli_DebtDiscountPremiumFutureAmortizationYearThree" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_DebtDiscountPremiumFutureAmortizationYearThree" xlink:to="cli_DebtDiscountPremiumFutureAmortizationYearThree_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_DebtDiscountPremiumFutureAmortizationYearThree_lbl" xml:lang="en-US">Debt Discount Premium Future Amortization Year Three</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_DebtDiscountPremiumFutureAmortizationYearThree_lbl" xml:lang="en-US">Debt Discount Premium Future Amortization Year Three</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_DebtDiscountPremiumFutureAmortizationYearThree_lbl" xml:lang="en-US">Scheduled Amortization, 2014</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_DebtDiscountPremiumFutureAmortizationYearFour" xlink:label="cli_DebtDiscountPremiumFutureAmortizationYearFour" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_DebtDiscountPremiumFutureAmortizationYearFour" xlink:to="cli_DebtDiscountPremiumFutureAmortizationYearFour_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_DebtDiscountPremiumFutureAmortizationYearFour_lbl" xml:lang="en-US">Debt Discount Premium Future Amortization Year Four</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_DebtDiscountPremiumFutureAmortizationYearFour_lbl" xml:lang="en-US">Debt Discount Premium Future Amortization Year Four</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_DebtDiscountPremiumFutureAmortizationYearFour_lbl" xml:lang="en-US">Scheduled Amortization, 2015</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_DebtDiscountPremiumFutureAmortizationYearFive" xlink:label="cli_DebtDiscountPremiumFutureAmortizationYearFive" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_DebtDiscountPremiumFutureAmortizationYearFive" xlink:to="cli_DebtDiscountPremiumFutureAmortizationYearFive_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_DebtDiscountPremiumFutureAmortizationYearFive_lbl" xml:lang="en-US">Debt Discount Premium Future Amortization Year Five</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_DebtDiscountPremiumFutureAmortizationYearFive_lbl" xml:lang="en-US">Debt Discount Premium Future Amortization Year Five</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_DebtDiscountPremiumFutureAmortizationYearFive_lbl" xml:lang="en-US">Scheduled Amortization, 2016</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_DebtDiscountPremiumFutureAmortizationYearThereafter" xlink:label="cli_DebtDiscountPremiumFutureAmortizationYearThereafter" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_DebtDiscountPremiumFutureAmortizationYearThereafter" xlink:to="cli_DebtDiscountPremiumFutureAmortizationYearThereafter_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_DebtDiscountPremiumFutureAmortizationYearThereafter_lbl" xml:lang="en-US">Debt Discount Premium Future Amortization Year Thereafter</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_DebtDiscountPremiumFutureAmortizationYearThereafter_lbl" xml:lang="en-US">Debt Discount Premium Future Amortization Year Thereafter</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_DebtDiscountPremiumFutureAmortizationYearThereafter_lbl" xml:lang="en-US">Scheduled Amortization, Thereafter</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_DebtDiscountPremiumFutureAmortizationTotal" xlink:label="cli_DebtDiscountPremiumFutureAmortizationTotal" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_DebtDiscountPremiumFutureAmortizationTotal" xlink:to="cli_DebtDiscountPremiumFutureAmortizationTotal_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_DebtDiscountPremiumFutureAmortizationTotal_lbl" xml:lang="en-US">Debt Discount Premium Future Amortization Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_DebtDiscountPremiumFutureAmortizationTotal_lbl" xml:lang="en-US">Debt Discount Premium Future Amortization Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_DebtDiscountPremiumFutureAmortizationTotal_lbl" xml:lang="en-US">Scheduled Amortization, Sub-total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="cli_DebtDiscountPremiumFutureAmortizationTotal_lbl" xml:lang="en-US">Scheduled Amortization, Sub-total</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentUnamortizedDiscount" xlink:label="us-gaap_DebtInstrumentUnamortizedDiscount" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentUnamortizedDiscount" xlink:to="us-gaap_DebtInstrumentUnamortizedDiscount_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentUnamortizedDiscount_lbl" xml:lang="en-US">Debt Instrument, Unamortized Discount</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_DebtInstrumentUnamortizedDiscount_lbl" xml:lang="en-US">Adjustment for unamortized debt discount/premium and mark-to market, net, as of December 31, 2011</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtInstrumentUnamortizedDiscount_lbl" xml:lang="en-US">Adjustment for unamortized debt discount/premium, net, as of December 31, 2011</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_DebtDiscountPremiumFutureAmortizationNetOfUnamortizedDiscountPremium" xlink:label="cli_DebtDiscountPremiumFutureAmortizationNetOfUnamortizedDiscountPremium" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_DebtDiscountPremiumFutureAmortizationNetOfUnamortizedDiscountPremium" xlink:to="cli_DebtDiscountPremiumFutureAmortizationNetOfUnamortizedDiscountPremium_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_DebtDiscountPremiumFutureAmortizationNetOfUnamortizedDiscountPremium_lbl" xml:lang="en-US">Debt Discount Premium Future Amortization Net Of Unamortized Discount Premium</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_DebtDiscountPremiumFutureAmortizationNetOfUnamortizedDiscountPremium_lbl" xml:lang="en-US">Debt Discount Premium Future Amortization Net Of Unamortized Discount Premium</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_DebtDiscountPremiumFutureAmortizationNetOfUnamortizedDiscountPremium_lbl" xml:lang="en-US">Scheduled Amortization, Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="cli_DebtDiscountPremiumFutureAmortizationNetOfUnamortizedDiscountPremium_lbl" xml:lang="en-US">Scheduled Amortization, Net</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_lbl" xml:lang="en-US">Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_lbl" xml:lang="en-US">Principal Maturities, 2012</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_lbl" xml:lang="en-US">Long-term Debt, Maturities, Repayments of Principal in Year Two</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_lbl" xml:lang="en-US">Principal Maturities, 2013</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_lbl" xml:lang="en-US">Long-term Debt, Maturities, Repayments of Principal in Year Three</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_lbl" xml:lang="en-US">Principal Maturities, 2014</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_lbl" xml:lang="en-US">Long-term Debt, Maturities, Repayments of Principal in Year Four</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_lbl" xml:lang="en-US">Principal Maturities, 2015</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_lbl" xml:lang="en-US">Long-term Debt, Maturities, Repayments of Principal in Year Five</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_lbl" xml:lang="en-US">Principal Maturities, 2016</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive" xlink:to="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive_lbl" xml:lang="en-US">Long-term Debt, Maturities, Repayments of Principal after Year Five</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive_lbl" xml:lang="en-US">Principal Maturities, Thereafter</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_LongTermDebtMaturitiesRepaymentsOfPrincipalGross" xlink:label="cli_LongTermDebtMaturitiesRepaymentsOfPrincipalGross" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_LongTermDebtMaturitiesRepaymentsOfPrincipalGross" xlink:to="cli_LongTermDebtMaturitiesRepaymentsOfPrincipalGross_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_LongTermDebtMaturitiesRepaymentsOfPrincipalGross_lbl" xml:lang="en-US">Long term debt maturities repayments of principal gross</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_LongTermDebtMaturitiesRepaymentsOfPrincipalGross_lbl" xml:lang="en-US">Long Term Debt Maturities Repayments Of Principal Gross</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_LongTermDebtMaturitiesRepaymentsOfPrincipalGross_lbl" xml:lang="en-US">Principal Maturities, Sub-Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="cli_LongTermDebtMaturitiesRepaymentsOfPrincipalGross_lbl" xml:lang="en-US">Principal Maturities, Sub-Total</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_LongTermDebtMaturitiesRepaymentsOfPrincipalTotal" xlink:label="cli_LongTermDebtMaturitiesRepaymentsOfPrincipalTotal" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_LongTermDebtMaturitiesRepaymentsOfPrincipalTotal" xlink:to="cli_LongTermDebtMaturitiesRepaymentsOfPrincipalTotal_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_LongTermDebtMaturitiesRepaymentsOfPrincipalTotal_lbl" xml:lang="en-US">LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_LongTermDebtMaturitiesRepaymentsOfPrincipalTotal_lbl" xml:lang="en-US">Long Term Debt Maturities Repayments Of Principal Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_LongTermDebtMaturitiesRepaymentsOfPrincipalTotal_lbl" xml:lang="en-US">Principal Maturities, Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="cli_LongTermDebtMaturitiesRepaymentsOfPrincipalTotal_lbl" xml:lang="en-US">Principal Maturities, Total</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_DebtInstrumentPeriodicPaymentYearOne" xlink:label="cli_DebtInstrumentPeriodicPaymentYearOne" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_DebtInstrumentPeriodicPaymentYearOne" xlink:to="cli_DebtInstrumentPeriodicPaymentYearOne_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_DebtInstrumentPeriodicPaymentYearOne_lbl" xml:lang="en-US">Debt instrument, periodic payment, year one.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_DebtInstrumentPeriodicPaymentYearOne_lbl" xml:lang="en-US">Debt Instrument Periodic Payment Year One</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_DebtInstrumentPeriodicPaymentYearOne_lbl" xml:lang="en-US">Total, 2012</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_DebtInstrumentPeriodicPaymentYearTwo" xlink:label="cli_DebtInstrumentPeriodicPaymentYearTwo" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_DebtInstrumentPeriodicPaymentYearTwo" xlink:to="cli_DebtInstrumentPeriodicPaymentYearTwo_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_DebtInstrumentPeriodicPaymentYearTwo_lbl" xml:lang="en-US">Debt instrument, periodic payment, year two.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_DebtInstrumentPeriodicPaymentYearTwo_lbl" xml:lang="en-US">Debt Instrument Periodic Payment Year Two</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_DebtInstrumentPeriodicPaymentYearTwo_lbl" xml:lang="en-US">Total, 2013</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_DebtInstrumentPeriodicPaymentYearThree" xlink:label="cli_DebtInstrumentPeriodicPaymentYearThree" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_DebtInstrumentPeriodicPaymentYearThree" xlink:to="cli_DebtInstrumentPeriodicPaymentYearThree_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_DebtInstrumentPeriodicPaymentYearThree_lbl" xml:lang="en-US">Debt instrument, periodic payment, year three.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_DebtInstrumentPeriodicPaymentYearThree_lbl" xml:lang="en-US">Debt Instrument Periodic Payment Year Three</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_DebtInstrumentPeriodicPaymentYearThree_lbl" xml:lang="en-US">Total, 2014</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_DebtInstrumentPeriodicPaymentYearFour" xlink:label="cli_DebtInstrumentPeriodicPaymentYearFour" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_DebtInstrumentPeriodicPaymentYearFour" xlink:to="cli_DebtInstrumentPeriodicPaymentYearFour_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_DebtInstrumentPeriodicPaymentYearFour_lbl" xml:lang="en-US">Debt instrument, periodic payment, year four.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_DebtInstrumentPeriodicPaymentYearFour_lbl" xml:lang="en-US">Debt Instrument Periodic Payment Year Four</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_DebtInstrumentPeriodicPaymentYearFour_lbl" xml:lang="en-US">Total, 2015</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_DebtInstrumentPeriodicPaymentYearFive" xlink:label="cli_DebtInstrumentPeriodicPaymentYearFive" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_DebtInstrumentPeriodicPaymentYearFive" xlink:to="cli_DebtInstrumentPeriodicPaymentYearFive_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_DebtInstrumentPeriodicPaymentYearFive_lbl" xml:lang="en-US">Debt instrument, periodic payment, year five.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_DebtInstrumentPeriodicPaymentYearFive_lbl" xml:lang="en-US">Debt Instrument Periodic Payment Year Five</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_DebtInstrumentPeriodicPaymentYearFive_lbl" xml:lang="en-US">Total, 2016</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_DebtInstrumentPeriodicPaymentThereafter" xlink:label="cli_DebtInstrumentPeriodicPaymentThereafter" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_DebtInstrumentPeriodicPaymentThereafter" xlink:to="cli_DebtInstrumentPeriodicPaymentThereafter_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_DebtInstrumentPeriodicPaymentThereafter_lbl" xml:lang="en-US">Debt instrument, periodic payment, thereafter.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_DebtInstrumentPeriodicPaymentThereafter_lbl" xml:lang="en-US">Debt Instrument Periodic Payment Thereafter</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_DebtInstrumentPeriodicPaymentThereafter_lbl" xml:lang="en-US">Total, Thereafter</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_DebtInstrumentPeriodicPaymentGross" xlink:label="cli_DebtInstrumentPeriodicPaymentGross" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_DebtInstrumentPeriodicPaymentGross" xlink:to="cli_DebtInstrumentPeriodicPaymentGross_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_DebtInstrumentPeriodicPaymentGross_lbl" xml:lang="en-US">Debt instrument periodic payment gross</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_DebtInstrumentPeriodicPaymentGross_lbl" xml:lang="en-US">Debt Instrument Periodic Payment Gross</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_DebtInstrumentPeriodicPaymentGross_lbl" xml:lang="en-US">Total, Sub-total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="cli_DebtInstrumentPeriodicPaymentGross_lbl" xml:lang="en-US">Total, Sub-total</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_LongTermDebtWeightedAverageInterestRateMaturitiesYearOne" xlink:label="cli_LongTermDebtWeightedAverageInterestRateMaturitiesYearOne" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_LongTermDebtWeightedAverageInterestRateMaturitiesYearOne" xlink:to="cli_LongTermDebtWeightedAverageInterestRateMaturitiesYearOne_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_LongTermDebtWeightedAverageInterestRateMaturitiesYearOne_lbl" xml:lang="en-US">Long term debt, weighted average interest in rate, maturities year one.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_LongTermDebtWeightedAverageInterestRateMaturitiesYearOne_lbl" xml:lang="en-US">Long Term Debt Weighted Average Interest Rate Maturities Year One</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_LongTermDebtWeightedAverageInterestRateMaturitiesYearOne_lbl" xml:lang="en-US">Weighted Avg. Interest Rate of Future Repayments, 2012</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_LongTermDebtWeightedAverageInterestRateMaturitiesYearTwo" xlink:label="cli_LongTermDebtWeightedAverageInterestRateMaturitiesYearTwo" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_LongTermDebtWeightedAverageInterestRateMaturitiesYearTwo" xlink:to="cli_LongTermDebtWeightedAverageInterestRateMaturitiesYearTwo_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_LongTermDebtWeightedAverageInterestRateMaturitiesYearTwo_lbl" xml:lang="en-US">Long term debt, weighted average interest rate maturities year two.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_LongTermDebtWeightedAverageInterestRateMaturitiesYearTwo_lbl" xml:lang="en-US">Long Term Debt Weighted Average Interest Rate Maturities Year Two</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_LongTermDebtWeightedAverageInterestRateMaturitiesYearTwo_lbl" xml:lang="en-US">Weighted Avg. Interest Rate of Future Repayments, 2013</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_LongTermDebtWeightedAverageInterestRateMaturitiesYearThree" xlink:label="cli_LongTermDebtWeightedAverageInterestRateMaturitiesYearThree" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_LongTermDebtWeightedAverageInterestRateMaturitiesYearThree" xlink:to="cli_LongTermDebtWeightedAverageInterestRateMaturitiesYearThree_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_LongTermDebtWeightedAverageInterestRateMaturitiesYearThree_lbl" xml:lang="en-US">Long term debt, weighted average interest rate maturities year three.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_LongTermDebtWeightedAverageInterestRateMaturitiesYearThree_lbl" xml:lang="en-US">Long Term Debt Weighted Average Interest Rate Maturities Year Three</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_LongTermDebtWeightedAverageInterestRateMaturitiesYearThree_lbl" xml:lang="en-US">Weighted Avg. Interest Rate of Future Repayments, 2014</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_LongTermDebtWeightedAverageInterestRateMaturitiesYearFour" xlink:label="cli_LongTermDebtWeightedAverageInterestRateMaturitiesYearFour" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_LongTermDebtWeightedAverageInterestRateMaturitiesYearFour" xlink:to="cli_LongTermDebtWeightedAverageInterestRateMaturitiesYearFour_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_LongTermDebtWeightedAverageInterestRateMaturitiesYearFour_lbl" xml:lang="en-US">Long term debt, weighted average interest rate maturities year four.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_LongTermDebtWeightedAverageInterestRateMaturitiesYearFour_lbl" xml:lang="en-US">Long Term Debt Weighted Average Interest Rate Maturities Year Four</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_LongTermDebtWeightedAverageInterestRateMaturitiesYearFour_lbl" xml:lang="en-US">Weighted Avg. Interest Rate of Future Repayments, 2015</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_LongTermDebtWeightedAverageInterestRateMaturitiesYearFive" xlink:label="cli_LongTermDebtWeightedAverageInterestRateMaturitiesYearFive" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_LongTermDebtWeightedAverageInterestRateMaturitiesYearFive" xlink:to="cli_LongTermDebtWeightedAverageInterestRateMaturitiesYearFive_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_LongTermDebtWeightedAverageInterestRateMaturitiesYearFive_lbl" xml:lang="en-US">Long term debt, weighted average interest rate maturities year five.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_LongTermDebtWeightedAverageInterestRateMaturitiesYearFive_lbl" xml:lang="en-US">Long Term Debt Weighted Average Interest Rate Maturities Year Five</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_LongTermDebtWeightedAverageInterestRateMaturitiesYearFive_lbl" xml:lang="en-US">Weighted Avg. Interest Rate of Future Repayments, 2016</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_LongTermDebtWeightedAverageInterestRateMaturitiesYearThereafter" xlink:label="cli_LongTermDebtWeightedAverageInterestRateMaturitiesYearThereafter" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_LongTermDebtWeightedAverageInterestRateMaturitiesYearThereafter" xlink:to="cli_LongTermDebtWeightedAverageInterestRateMaturitiesYearThereafter_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_LongTermDebtWeightedAverageInterestRateMaturitiesYearThereafter_lbl" xml:lang="en-US">Long term debt, weighted average interest rate maturities year thereafter.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_LongTermDebtWeightedAverageInterestRateMaturitiesYearThereafter_lbl" xml:lang="en-US">Long Term Debt Weighted Average Interest Rate Maturities Year Thereafter</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_LongTermDebtWeightedAverageInterestRateMaturitiesYearThereafter_lbl" xml:lang="en-US">Weighted Avg. Interest Rate of Future Repayments, Thereafter</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_PercentOfCompanysOutstandingDebtUsedToCalculateVariableDebtInterestRates" xlink:label="cli_PercentOfCompanysOutstandingDebtUsedToCalculateVariableDebtInterestRates" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_PercentOfCompanysOutstandingDebtUsedToCalculateVariableDebtInterestRates" xlink:to="cli_PercentOfCompanysOutstandingDebtUsedToCalculateVariableDebtInterestRates_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_PercentOfCompanysOutstandingDebtUsedToCalculateVariableDebtInterestRates_lbl" xml:lang="en-US">Percent Of Companys Outstanding Debt Used To Calculate Variable Debt Interest Rates</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_PercentOfCompanysOutstandingDebtUsedToCalculateVariableDebtInterestRates_lbl" xml:lang="en-US">Percent Of Companys Outstanding Debt Used To Calculate Variable Debt Interest Rates</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_PercentOfCompanysOutstandingDebtUsedToCalculateVariableDebtInterestRates_lbl" xml:lang="en-US">Percent of Company's outstanding debt used to calculate variable interest rates</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_UnsecuredRevolvingCreditFacilityAmortizedDeferredFinancingCosts" xlink:label="cli_UnsecuredRevolvingCreditFacilityAmortizedDeferredFinancingCosts" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_UnsecuredRevolvingCreditFacilityAmortizedDeferredFinancingCosts" xlink:to="cli_UnsecuredRevolvingCreditFacilityAmortizedDeferredFinancingCosts_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_UnsecuredRevolvingCreditFacilityAmortizedDeferredFinancingCosts_lbl" xml:lang="en-US">unsecured revolving credit facility, amortized deferred financing costs.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_UnsecuredRevolvingCreditFacilityAmortizedDeferredFinancingCosts_lbl" xml:lang="en-US">Unsecured Revolving Credit Facility, Amortized Deferred Financing Costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_UnsecuredRevolvingCreditFacilityAmortizedDeferredFinancingCosts_lbl" xml:lang="en-US">Amortized deferred financing costs</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate_lbl" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Rate</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate_lbl" xml:lang="en-US">Maximum employee subscription rate, percentage of compensation</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ShareBasedCompensationArrangementByShareBasedPaymentAwardMinimumEmployeeSubscriptionRate" xlink:label="cli_ShareBasedCompensationArrangementByShareBasedPaymentAwardMinimumEmployeeSubscriptionRate" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ShareBasedCompensationArrangementByShareBasedPaymentAwardMinimumEmployeeSubscriptionRate" xlink:to="cli_ShareBasedCompensationArrangementByShareBasedPaymentAwardMinimumEmployeeSubscriptionRate_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ShareBasedCompensationArrangementByShareBasedPaymentAwardMinimumEmployeeSubscriptionRate_lbl" xml:lang="en-US">Share Based Compensation Arrangement By Share Based Payment Award Minimum Employee Subscription Rate</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ShareBasedCompensationArrangementByShareBasedPaymentAwardMinimumEmployeeSubscriptionRate_lbl" xml:lang="en-US">Share Based Compensation Arrangement By Share Based Payment Award Minimum Employee Subscription Rate</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ShareBasedCompensationArrangementByShareBasedPaymentAwardMinimumEmployeeSubscriptionRate_lbl" xml:lang="en-US">Minimum employee subscription rate, percentage of compensation</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_EmployeePreTaxContributionsVestedPercent" xlink:label="cli_EmployeePreTaxContributionsVestedPercent" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_EmployeePreTaxContributionsVestedPercent" xlink:to="cli_EmployeePreTaxContributionsVestedPercent_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_EmployeePreTaxContributionsVestedPercent_lbl" xml:lang="en-US">Employee pre-tax contributions vested percent.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_EmployeePreTaxContributionsVestedPercent_lbl" xml:lang="en-US">Employee Pre Tax Contributions Vested Percent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_EmployeePreTaxContributionsVestedPercent_lbl" xml:lang="en-US">Employee pre-tax contributions vested percent</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_DefinedContributionPlanEmployerMatchingContributionPercent" xlink:label="cli_DefinedContributionPlanEmployerMatchingContributionPercent" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_DefinedContributionPlanEmployerMatchingContributionPercent" xlink:to="cli_DefinedContributionPlanEmployerMatchingContributionPercent_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_DefinedContributionPlanEmployerMatchingContributionPercent_lbl" xml:lang="en-US">Defined contribution plan employer matching contribution percent.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_DefinedContributionPlanEmployerMatchingContributionPercent_lbl" xml:lang="en-US">Defined Contribution Plan Employer Matching Contribution Percent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_DefinedContributionPlanEmployerMatchingContributionPercent_lbl" xml:lang="en-US">Corporation profit sharing contribution percent, per year</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_PercentVestedAfterTotalServicePeriod" xlink:label="cli_PercentVestedAfterTotalServicePeriod" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_PercentVestedAfterTotalServicePeriod" xlink:to="cli_PercentVestedAfterTotalServicePeriod_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_PercentVestedAfterTotalServicePeriod_lbl" xml:lang="en-US">Percent vested after total service period.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_PercentVestedAfterTotalServicePeriod_lbl" xml:lang="en-US">Percent Vested After Total Service Period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_PercentVestedAfterTotalServicePeriod_lbl" xml:lang="en-US">Percent vested after total service period</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRights" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRights" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRights" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRights_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRights_lbl" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRights_lbl" xml:lang="en-US">Employee's vesting rights</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriodMinimum" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriodMinimum" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriodMinimum" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriodMinimum_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriodMinimum_lbl" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period, Minimum</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriodMinimum_lbl" xml:lang="en-US">Profit sharing contributions period before partial vesting</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriodMaximum" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriodMaximum" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriodMaximum" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriodMaximum_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriodMaximum_lbl" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period, Maximum</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriodMaximum_lbl" xml:lang="en-US">Period of service before being fully vested</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EmployeeBenefitsAndShareBasedCompensation" xlink:label="us-gaap_EmployeeBenefitsAndShareBasedCompensation" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EmployeeBenefitsAndShareBasedCompensation" xlink:to="us-gaap_EmployeeBenefitsAndShareBasedCompensation_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EmployeeBenefitsAndShareBasedCompensation_lbl" xml:lang="en-US">Employee Benefits and Share-based Compensation</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_EmployeeBenefitsAndShareBasedCompensation_lbl" xml:lang="en-US">Expenses for employee benefit plan</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_EmployeeBenefitsAndShareBasedCompensation_lbl" xml:lang="en-US">Employee Benefits and Share-based Compensation, Total</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredCompensationArrangementWithIndividualEmployerContribution" xlink:label="us-gaap_DeferredCompensationArrangementWithIndividualEmployerContribution" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredCompensationArrangementWithIndividualEmployerContribution" xlink:to="us-gaap_DeferredCompensationArrangementWithIndividualEmployerContribution_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredCompensationArrangementWithIndividualEmployerContribution_lbl" xml:lang="en-US">Deferred Compensation Arrangement with Individual, Employer Contribution</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DeferredCompensationArrangementWithIndividualEmployerContribution_lbl" xml:lang="en-US">Employer contribution to employee benefit plan</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DeferredCompensationArrangementWithIndividualEmployerContribution_lbl" xml:lang="en-US">Compensation paid to vice president</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentFairValue" xlink:label="us-gaap_DebtInstrumentFairValue" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentFairValue" xlink:to="us-gaap_DebtInstrumentFairValue_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentFairValue_lbl" xml:lang="en-US">Debt Instrument, Fair Value</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_DebtInstrumentFairValue_lbl" xml:lang="en-US">Loan balance</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DebtInstrumentFairValue_lbl" xml:lang="en-US">Fair value of company's long-term debt</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DebtInstrumentCarryingAmount" xlink:label="us-gaap_DebtInstrumentCarryingAmount" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentCarryingAmount" xlink:to="us-gaap_DebtInstrumentCarryingAmount_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DebtInstrumentCarryingAmount_lbl" xml:lang="en-US">Long-term Debt, Gross</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DebtInstrumentCarryingAmount_lbl" xml:lang="en-US">Book value of company's long-term debt</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_CommitmentsAndContingenciesTable" xlink:label="cli_CommitmentsAndContingenciesTable" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_CommitmentsAndContingenciesTable" xlink:to="cli_CommitmentsAndContingenciesTable_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_CommitmentsAndContingenciesTable_lbl" xml:lang="en-US">Commitments And Contingencies [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_CommitmentsAndContingenciesTable_lbl" xml:lang="en-US">Commitments and Contingencies [Table]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_IronstateDevelopmentLlcMember" xlink:label="cli_IronstateDevelopmentLlcMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_IronstateDevelopmentLlcMember" xlink:to="cli_IronstateDevelopmentLlcMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_IronstateDevelopmentLlcMember_lbl" xml:lang="en-US">Ironstate Development LLC [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_IronstateDevelopmentLlcMember_lbl" xml:lang="en-US">Ironstate Development Llc [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_IronstateDevelopmentLlcMember_lbl" xml:lang="en-US">Ironstate Development LLC [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_HarborsideResidentialProjectMember" xlink:label="cli_HarborsideResidentialProjectMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_HarborsideResidentialProjectMember" xlink:to="cli_HarborsideResidentialProjectMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_HarborsideResidentialProjectMember_lbl" xml:lang="en-US">Harborside Residential Project [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_HarborsideResidentialProjectMember_lbl" xml:lang="en-US">Harborside Residential Project [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_HarborsideResidentialProjectMember_lbl" xml:lang="en-US">Harborside Residential Project [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_RealEstatePropertySubjectToLockUpAxis" xlink:label="cli_RealEstatePropertySubjectToLockUpAxis" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_RealEstatePropertySubjectToLockUpAxis" xlink:to="cli_RealEstatePropertySubjectToLockUpAxis_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_RealEstatePropertySubjectToLockUpAxis_lbl" xml:lang="en-US">Real Estate Property Subject to Lock Up [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_RealEstatePropertySubjectToLockUpAxis_lbl" xml:lang="en-US">Real Estate Property Subject to Lock Up [Axis]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_RealEstatePropertySubjectToLockUpDomain" xlink:label="cli_RealEstatePropertySubjectToLockUpDomain" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_RealEstatePropertySubjectToLockUpDomain" xlink:to="cli_RealEstatePropertySubjectToLockUpDomain_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_RealEstatePropertySubjectToLockUpDomain_lbl" xml:lang="en-US">Real Estate Property Subject to Lock Up [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_RealEstatePropertySubjectToLockUpDomain_lbl" xml:lang="en-US">Real Estate Property Subject To Lock Up [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_RealEstatePropertySubjectToLockUpDomain_lbl" xml:lang="en-US">Real Estate Property Subject to Lock Up [Domain]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_PropertyLockUpsMember" xlink:label="cli_PropertyLockUpsMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_PropertyLockUpsMember" xlink:to="cli_PropertyLockUpsMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_PropertyLockUpsMember_lbl" xml:lang="en-US">Property Lock-Ups [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_PropertyLockUpsMember_lbl" xml:lang="en-US">Property Lock Ups [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_PropertyLockUpsMember_lbl" xml:lang="en-US">Property Lock-Ups [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_PropertyLockUpsExpiredMember" xlink:label="cli_PropertyLockUpsExpiredMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_PropertyLockUpsExpiredMember" xlink:to="cli_PropertyLockUpsExpiredMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_PropertyLockUpsExpiredMember_lbl" xml:lang="en-US">Property Lock-Ups Expired [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_PropertyLockUpsExpiredMember_lbl" xml:lang="en-US">Property Lock Ups Expired [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_PropertyLockUpsExpiredMember_lbl" xml:lang="en-US">Property Lock-Ups Expired [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_AreaAxis" xlink:label="cli_AreaAxis" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_AreaAxis" xlink:to="cli_AreaAxis_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_AreaAxis_lbl" xml:lang="en-US">Area [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_AreaAxis_lbl" xml:lang="en-US">Area [Axis]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_AreaDomain" xlink:label="cli_AreaDomain" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_AreaDomain" xlink:to="cli_AreaDomain_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_AreaDomain_lbl" xml:lang="en-US">Area [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_AreaDomain_lbl" xml:lang="en-US">Area [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_AreaDomain_lbl" xml:lang="en-US">Area [Domain]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_HarborsidePlazaFourAgreementMember" xlink:label="cli_HarborsidePlazaFourAgreementMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_HarborsidePlazaFourAgreementMember" xlink:to="cli_HarborsidePlazaFourAgreementMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_HarborsidePlazaFourAgreementMember_lbl" xml:lang="en-US">Harborside Plaza 4-A Agreement [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_HarborsidePlazaFourAgreementMember_lbl" xml:lang="en-US">Harborside Plaza Four Agreement [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_HarborsidePlazaFourAgreementMember_lbl" xml:lang="en-US">Harborside Plaza 4-A Agreement [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_HarborsidePlazaFiveAgreementMember" xlink:label="cli_HarborsidePlazaFiveAgreementMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_HarborsidePlazaFiveAgreementMember" xlink:to="cli_HarborsidePlazaFiveAgreementMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_HarborsidePlazaFiveAgreementMember_lbl" xml:lang="en-US">Harborside Plaza 5 Agreement [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_HarborsidePlazaFiveAgreementMember_lbl" xml:lang="en-US">Harborside Plaza Five Agreement [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_HarborsidePlazaFiveAgreementMember_lbl" xml:lang="en-US">Harborside Plaza 5 Agreement [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_CommitmentsAndContingenciesLineItems" xlink:label="cli_CommitmentsAndContingenciesLineItems" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_CommitmentsAndContingenciesLineItems" xlink:to="cli_CommitmentsAndContingenciesLineItems_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_CommitmentsAndContingenciesLineItems_lbl" xml:lang="en-US">Commitments And Contingencies [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_CommitmentsAndContingenciesLineItems_lbl" xml:lang="en-US">Commitments And Contingencies [Line Items]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ProjectTerm" xlink:label="cli_ProjectTerm" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ProjectTerm" xlink:to="cli_ProjectTerm_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ProjectTerm_lbl" xml:lang="en-US">Project Term</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ProjectTerm_lbl" xml:lang="en-US">Project Term</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ProjectTerm_lbl" xml:lang="en-US">Project period (years)</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_PaymentsInLieuOfPropertyTaxAsPercentageOfTotalProjectCost" xlink:label="cli_PaymentsInLieuOfPropertyTaxAsPercentageOfTotalProjectCost" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_PaymentsInLieuOfPropertyTaxAsPercentageOfTotalProjectCost" xlink:to="cli_PaymentsInLieuOfPropertyTaxAsPercentageOfTotalProjectCost_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_PaymentsInLieuOfPropertyTaxAsPercentageOfTotalProjectCost_lbl" xml:lang="en-US">Payments in Lieu of Property Tax As Percentage of Total Project Cost</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_PaymentsInLieuOfPropertyTaxAsPercentageOfTotalProjectCost_lbl" xml:lang="en-US">Payments in Lieu of Property Tax As Percentage of Total Project Cost</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_PaymentsInLieuOfPropertyTaxAsPercentageOfTotalProjectCost_lbl" xml:lang="en-US">Percentage of PILOT on project cost</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_EstimatedCostOfProject" xlink:label="cli_EstimatedCostOfProject" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_EstimatedCostOfProject" xlink:to="cli_EstimatedCostOfProject_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_EstimatedCostOfProject_lbl" xml:lang="en-US">Estimated Cost Of Project</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_EstimatedCostOfProject_lbl" xml:lang="en-US">Estimated Cost Of Project</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_EstimatedCostOfProject_lbl" xml:lang="en-US">Total project cost</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_PaymentsInLieuOfPropertyTaxes" xlink:label="cli_PaymentsInLieuOfPropertyTaxes" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_PaymentsInLieuOfPropertyTaxes" xlink:to="cli_PaymentsInLieuOfPropertyTaxes_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_PaymentsInLieuOfPropertyTaxes_lbl" xml:lang="en-US">Payments In Lieu Of Property Taxes</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_PaymentsInLieuOfPropertyTaxes_lbl" xml:lang="en-US">Payments In Lieu Of Property Taxes</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_PaymentsInLieuOfPropertyTaxes_lbl" xml:lang="en-US">Payments in lieu of property taxes (PILOT)</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="cli_PaymentsInLieuOfPropertyTaxes_lbl" xml:lang="en-US">PILOT</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OperatingLeaseExpense" xlink:label="cli_OperatingLeaseExpense" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OperatingLeaseExpense" xlink:to="cli_OperatingLeaseExpense_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OperatingLeaseExpense_lbl" xml:lang="en-US">Rent expense for each period for which an income statement is presented for minimum lease payments, contingent rentals, and sublease rentals.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OperatingLeaseExpense_lbl" xml:lang="en-US">Operating Lease Expense</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OperatingLeaseExpense_lbl" xml:lang="en-US">Ground lease expense incurred</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_PropertyNetBookValue" xlink:label="cli_PropertyNetBookValue" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_PropertyNetBookValue" xlink:to="cli_PropertyNetBookValue_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_PropertyNetBookValue_lbl" xml:lang="en-US">Property Net Book Value</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_PropertyNetBookValue_lbl" xml:lang="en-US">Property Net Book Value</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_PropertyNetBookValue_lbl" xml:lang="en-US">Properties aggregate net book value</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_PropertiesRestrictionForSaleExpirationPeriod" xlink:label="cli_PropertiesRestrictionForSaleExpirationPeriod" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_PropertiesRestrictionForSaleExpirationPeriod" xlink:to="cli_PropertiesRestrictionForSaleExpirationPeriod_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_PropertiesRestrictionForSaleExpirationPeriod_lbl" xml:lang="en-US">Properties Restriction For Sale Expiration Period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_PropertiesRestrictionForSaleExpirationPeriod_lbl" xml:lang="en-US">Properties Restriction For Sale Expiration Period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_PropertiesRestrictionForSaleExpirationPeriod_lbl" xml:lang="en-US">Expiration year</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_AreaOfConstructedBuilding" xlink:label="cli_AreaOfConstructedBuilding" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_AreaOfConstructedBuilding" xlink:to="cli_AreaOfConstructedBuilding_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_AreaOfConstructedBuilding_lbl" xml:lang="en-US">Area of constructed building</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_AreaOfConstructedBuilding_lbl" xml:lang="en-US">Area Of Constructed Building</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_AreaOfConstructedBuilding_lbl" xml:lang="en-US">Area of building in square feet</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_LeaseTermDescription" xlink:label="cli_LeaseTermDescription" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_LeaseTermDescription" xlink:to="cli_LeaseTermDescription_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_LeaseTermDescription_lbl" xml:lang="en-US">Lease term description</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_LeaseTermDescription_lbl" xml:lang="en-US">Lease Term Description</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_LeaseTermDescription_lbl" xml:lang="en-US">Lease term description</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_DeliveryDateOfConstructedBuilding" xlink:label="cli_DeliveryDateOfConstructedBuilding" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_DeliveryDateOfConstructedBuilding" xlink:to="cli_DeliveryDateOfConstructedBuilding_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_DeliveryDateOfConstructedBuilding_lbl" xml:lang="en-US">Delivery date of constructed building</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_DeliveryDateOfConstructedBuilding_lbl" xml:lang="en-US">Delivery Date Of Constructed Building</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_DeliveryDateOfConstructedBuilding_lbl" xml:lang="en-US">Delivery date to tenant</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ConstructionAndDevelopmentCosts" xlink:label="us-gaap_ConstructionAndDevelopmentCosts" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConstructionAndDevelopmentCosts" xlink:to="us-gaap_ConstructionAndDevelopmentCosts_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ConstructionAndDevelopmentCosts_lbl" xml:lang="en-US">Construction and Development Costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_ConstructionAndDevelopmentCosts_lbl" xml:lang="en-US">Construction and Development Costs, Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ConstructionAndDevelopmentCosts_lbl" xml:lang="en-US">Total estimated costs of the project</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ConstructionAndDevelopmentCostsIncurred" xlink:label="cli_ConstructionAndDevelopmentCostsIncurred" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ConstructionAndDevelopmentCostsIncurred" xlink:to="cli_ConstructionAndDevelopmentCostsIncurred_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ConstructionAndDevelopmentCostsIncurred_lbl" xml:lang="en-US">Construction and development costs incurred</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ConstructionAndDevelopmentCostsIncurred_lbl" xml:lang="en-US">Construction And Development Costs Incurred</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ConstructionAndDevelopmentCostsIncurred_lbl" xml:lang="en-US">Costs of the project incurred</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_CapitalCreditReceivablePerSquareFoot" xlink:label="cli_CapitalCreditReceivablePerSquareFoot" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_CapitalCreditReceivablePerSquareFoot" xlink:to="cli_CapitalCreditReceivablePerSquareFoot_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_CapitalCreditReceivablePerSquareFoot_lbl" xml:lang="en-US">Capital credit receivable per square foot.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_CapitalCreditReceivablePerSquareFoot_lbl" xml:lang="en-US">Capital Credit Receivable Per Square Foot</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_CapitalCreditReceivablePerSquareFoot_lbl" xml:lang="en-US">Capital credit receivable per square foot</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_CompensationCharge" xlink:label="cli_CompensationCharge" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_CompensationCharge" xlink:to="cli_CompensationCharge_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_CompensationCharge_lbl" xml:lang="en-US">Compensation charge</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_CompensationCharge_lbl" xml:lang="en-US">Compensation Charge</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="cli_CompensationCharge_lbl" xml:lang="en-US">Compensation paid to vice president</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_lbl" xml:lang="en-US">Operating Leases, Future Minimum Payments Due, Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_lbl" xml:lang="en-US">2012</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_lbl" xml:lang="en-US">October 1 through December 31, 2010</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_lbl" xml:lang="en-US">Operating Leases, Future Minimum Payments, Due in Two Years</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_lbl" xml:lang="en-US">2013</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_lbl" xml:lang="en-US">Operating Leases, Future Minimum Payments, Due in Three Years</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_lbl" xml:lang="en-US">2014</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_lbl" xml:lang="en-US">Operating Leases, Future Minimum Payments, Due in Four Years</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_lbl" xml:lang="en-US">2015</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_lbl" xml:lang="en-US">Operating Leases, Future Minimum Payments, Due in Five Years</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_lbl" xml:lang="en-US">2016</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_lbl" xml:lang="en-US">Operating Leases, Future Minimum Payments, Due Thereafter</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_lbl" xml:lang="en-US">2017 through 2084</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDue" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDue" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsDue" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsDue_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDue_lbl" xml:lang="en-US">Operating Leases, Future Minimum Payments Due</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDue_lbl" xml:lang="en-US">Operating Leases, Future Minimum Payments Due, Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDue_lbl" xml:lang="en-US">Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsDue_lbl" xml:lang="en-US">Total</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableCurrent" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableCurrent" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableCurrent" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableCurrent_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableCurrent_lbl" xml:lang="en-US">Operating Leases, Future Minimum Payments Receivable, Current</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableCurrent_lbl" xml:lang="en-US">2012</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableCurrent_lbl" xml:lang="en-US">April 1 through December 31, 2011</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInTwoYears" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInTwoYears" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInTwoYears" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInTwoYears_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInTwoYears_lbl" xml:lang="en-US">Operating Leases, Future Minimum Payments Receivable, in Two Years</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInTwoYears_lbl" xml:lang="en-US">2013</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInThreeYears" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInThreeYears" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInThreeYears" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInThreeYears_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInThreeYears_lbl" xml:lang="en-US">Operating Leases, Future Minimum Payments Receivable, in Three Years</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInThreeYears_lbl" xml:lang="en-US">2014</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInFourYears" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInFourYears" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInFourYears" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInFourYears_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInFourYears_lbl" xml:lang="en-US">Operating Leases, Future Minimum Payments Receivable, in Four Years</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInFourYears_lbl" xml:lang="en-US">2015</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInFiveYears" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInFiveYears" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInFiveYears" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInFiveYears_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInFiveYears_lbl" xml:lang="en-US">Operating Leases, Future Minimum Payments Receivable, in Five Years</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableInFiveYears_lbl" xml:lang="en-US">2016</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableThereafter" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableThereafter" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableThereafter" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableThereafter_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableThereafter_lbl" xml:lang="en-US">Operating Leases, Future Minimum Payments Receivable, Thereafter</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableThereafter_lbl" xml:lang="en-US">2017 and thereafter</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsReceivableThereafter_lbl" xml:lang="en-US">2015 through 2084</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsReceivable" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsReceivable" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OperatingLeasesFutureMinimumPaymentsReceivable" xlink:to="us-gaap_OperatingLeasesFutureMinimumPaymentsReceivable_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsReceivable_lbl" xml:lang="en-US">Operating Leases, Future Minimum Payments Receivable</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_OperatingLeasesFutureMinimumPaymentsReceivable_lbl" xml:lang="en-US">Total</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LeaseExpirationDate" xlink:label="us-gaap_LeaseExpirationDate" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LeaseExpirationDate" xlink:to="us-gaap_LeaseExpirationDate_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_LeaseExpirationDate_lbl" xml:lang="en-US">Lease Expiration Date</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_LeaseExpirationDate_lbl" xml:lang="en-US">Operating leases with various expiration dates through year</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_LeaseExpirationDate_lbl" xml:lang="en-US">Lease expiration date</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_MackCaliRealtyCorporationStockholdersEquityTable" xlink:label="cli_MackCaliRealtyCorporationStockholdersEquityTable" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_MackCaliRealtyCorporationStockholdersEquityTable" xlink:to="cli_MackCaliRealtyCorporationStockholdersEquityTable_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_MackCaliRealtyCorporationStockholdersEquityTable_lbl" xml:lang="en-US">Mack-Cali Realty Corporation Stockholders' Equity [Table]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_MackCaliRealtyCorporationStockholdersEquityTable_lbl" xml:lang="en-US">Mack-Cali Realty Corporation Stockholders' Equity [Table]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="us-gaap_StatementScenarioAxis" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementScenarioAxis" xlink:to="us-gaap_StatementScenarioAxis_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StatementScenarioAxis_lbl" xml:lang="en-US">Statement, Scenario [Axis]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="us-gaap_ScenarioUnspecifiedDomain" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScenarioUnspecifiedDomain" xlink:to="us-gaap_ScenarioUnspecifiedDomain_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScenarioUnspecifiedDomain_lbl" xml:lang="en-US">Scenario Unspecified [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ScenarioUnspecifiedDomain_lbl" xml:lang="en-US">Scenario, Unspecified [Domain]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RepurchaseOfEquityMember" xlink:label="us-gaap_RepurchaseOfEquityMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RepurchaseOfEquityMember" xlink:to="us-gaap_RepurchaseOfEquityMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RepurchaseOfEquityMember_lbl" xml:lang="en-US">Repurchase Of Equity [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RepurchaseOfEquityMember_lbl" xml:lang="en-US">Repurchase Of Equity [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_DividendReinvestmentAndStockPurchasePlanMember" xlink:label="cli_DividendReinvestmentAndStockPurchasePlanMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_DividendReinvestmentAndStockPurchasePlanMember" xlink:to="cli_DividendReinvestmentAndStockPurchasePlanMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_DividendReinvestmentAndStockPurchasePlanMember_lbl" xml:lang="en-US">Dividend Reinvestment And Stock Purchase Plan [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_DividendReinvestmentAndStockPurchasePlanMember_lbl" xml:lang="en-US">Dividend Reinvestment And Stock Purchase Plan [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_DividendReinvestmentAndStockPurchasePlanMember_lbl" xml:lang="en-US">Dividend Reinvestment And Stock Purchase Plan [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_StockOptionActivityLineItems" xlink:label="cli_StockOptionActivityLineItems" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_StockOptionActivityLineItems" xlink:to="cli_StockOptionActivityLineItems_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_StockOptionActivityLineItems_lbl" xml:lang="en-US">Stock Option Activity [Line Items]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_StockOptionActivityLineItems_lbl" xml:lang="en-US">Stock Option Activity [Line Items]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_MaximumPercentageOfOutstandingShareOwnedByRealEstateInvestmentTrust" xlink:label="cli_MaximumPercentageOfOutstandingShareOwnedByRealEstateInvestmentTrust" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_MaximumPercentageOfOutstandingShareOwnedByRealEstateInvestmentTrust" xlink:to="cli_MaximumPercentageOfOutstandingShareOwnedByRealEstateInvestmentTrust_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_MaximumPercentageOfOutstandingShareOwnedByRealEstateInvestmentTrust_lbl" xml:lang="en-US">Maximum percentage of outstanding share owned by real estate investment trust</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_MaximumPercentageOfOutstandingShareOwnedByRealEstateInvestmentTrust_lbl" xml:lang="en-US">Maximum Percentage Of Outstanding Share Owned By Real Estate Investment Trust</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_MaximumPercentageOfOutstandingShareOwnedByRealEstateInvestmentTrust_lbl" xml:lang="en-US">Maximum percentage of outstanding share owned by REIT</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_DepositaryShares" xlink:label="cli_DepositaryShares" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_DepositaryShares" xlink:to="cli_DepositaryShares_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_DepositaryShares_lbl" xml:lang="en-US">Amount of depositary shares.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_DepositaryShares_lbl" xml:lang="en-US">Depositary Shares</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="cli_DepositaryShares_lbl" xml:lang="en-US">Amount of depositary shares converted from the preferred shares</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_DepositarySharesValuePerShare" xlink:label="cli_DepositarySharesValuePerShare" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_DepositarySharesValuePerShare" xlink:to="cli_DepositarySharesValuePerShare_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_DepositarySharesValuePerShare_lbl" xml:lang="en-US">Depositary shares value, per share.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_DepositarySharesValuePerShare_lbl" xml:lang="en-US">Depositary Shares Value Per Share</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="cli_DepositarySharesValuePerShare_lbl" xml:lang="en-US">Depositary shares value, per share</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_DepositaryShareEquivalentOfPreferredShare" xlink:label="cli_DepositaryShareEquivalentOfPreferredShare" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_DepositaryShareEquivalentOfPreferredShare" xlink:to="cli_DepositaryShareEquivalentOfPreferredShare_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_DepositaryShareEquivalentOfPreferredShare_lbl" xml:lang="en-US">One depositary share equivalent of one Series C Preferred Stock.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_DepositaryShareEquivalentOfPreferredShare_lbl" xml:lang="en-US">Depositary Share Equivalent Of Preferred Share</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="cli_DepositaryShareEquivalentOfPreferredShare_lbl" xml:lang="en-US">One depositary share equivalent of one Series C Preferred Stock</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PreferredStockRedemptionPricePerShare" xlink:label="us-gaap_PreferredStockRedemptionPricePerShare" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockRedemptionPricePerShare" xlink:to="us-gaap_PreferredStockRedemptionPricePerShare_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredStockRedemptionPricePerShare_lbl" xml:lang="en-US">Preferred stock, redemption price per share</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PreferredStockRedemptionPricePerShare_lbl" xml:lang="en-US">Preferred stock, redemption price per share</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_WriteOffOfPreferredStockIssuanceCost" xlink:label="cli_WriteOffOfPreferredStockIssuanceCost" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_WriteOffOfPreferredStockIssuanceCost" xlink:to="cli_WriteOffOfPreferredStockIssuanceCost_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_WriteOffOfPreferredStockIssuanceCost_lbl" xml:lang="en-US">Write-off of preferred stock issuance cost amounts on redemption.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_WriteOffOfPreferredStockIssuanceCost_lbl" xml:lang="en-US">Write Off Of Preferred Stock Issuance Cost</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_WriteOffOfPreferredStockIssuanceCost_lbl" xml:lang="en-US">Write off of preferred stock issuance costs</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockRepurchaseProgramAuthorizedAmount" xlink:label="us-gaap_StockRepurchaseProgramAuthorizedAmount" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockRepurchaseProgramAuthorizedAmount" xlink:to="us-gaap_StockRepurchaseProgramAuthorizedAmount_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockRepurchaseProgramAuthorizedAmount_lbl" xml:lang="en-US">Stock Repurchase Program Authorized Amount</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StockRepurchaseProgramAuthorizedAmount_lbl" xml:lang="en-US">Capacity of share repurchase program</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_DateShareRepurchaseProgramInitiation" xlink:label="cli_DateShareRepurchaseProgramInitiation" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_DateShareRepurchaseProgramInitiation" xlink:to="cli_DateShareRepurchaseProgramInitiation_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_DateShareRepurchaseProgramInitiation_lbl" xml:lang="en-US">Date Share Repurchase Program was initiated.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_DateShareRepurchaseProgramInitiation_lbl" xml:lang="en-US">Date Share Repurchase Program Initiation</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="cli_DateShareRepurchaseProgramInitiation_lbl" xml:lang="en-US">Date share repurchase program was initiated</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_StockRepurchasedAndRetiredShares" xlink:label="cli_StockRepurchasedAndRetiredShares" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_StockRepurchasedAndRetiredShares" xlink:to="cli_StockRepurchasedAndRetiredShares_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_StockRepurchasedAndRetiredShares_lbl" xml:lang="en-US">Number of shares that have been repurchased and retired.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_StockRepurchasedAndRetiredShares_lbl" xml:lang="en-US">Stock Repurchased And Retired Shares</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_StockRepurchasedAndRetiredShares_lbl" xml:lang="en-US">Stock repurchased and retired shares</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PaymentsForRepurchaseOfEquity" xlink:label="us-gaap_PaymentsForRepurchaseOfEquity" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsForRepurchaseOfEquity" xlink:to="us-gaap_PaymentsForRepurchaseOfEquity_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PaymentsForRepurchaseOfEquity_lbl" xml:lang="en-US">Payments for Repurchase of Equity</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_PaymentsForRepurchaseOfEquity_lbl" xml:lang="en-US">Payments for Repurchase of Equity, Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_PaymentsForRepurchaseOfEquity_lbl" xml:lang="en-US">Aggregate cost of stocks repurchased</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CommonStockSharesIssued" xlink:label="us-gaap_CommonStockSharesIssued" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesIssued" xlink:to="us-gaap_CommonStockSharesIssued_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xml:lang="en-US">Common Stock, Shares, Issued</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xml:lang="en-US">Shares issued</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xml:lang="en-US">Common Stock, Shares, Issued, Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xml:lang="en-US">Shares of common stock issued in public offering</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_NetProceedsFromCommonStockIssuance" xlink:label="cli_NetProceedsFromCommonStockIssuance" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_NetProceedsFromCommonStockIssuance" xlink:to="cli_NetProceedsFromCommonStockIssuance_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_NetProceedsFromCommonStockIssuance_lbl" xml:lang="en-US">Net Proceeds From Common Stock Issuance</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_NetProceedsFromCommonStockIssuance_lbl" xml:lang="en-US">Net proceeds from common stock issuance</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="cli_NetProceedsFromCommonStockIssuance_lbl" xml:lang="en-US">Partner's capital amount, public sale of units net of offering price</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount" xlink:label="us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount" xlink:to="us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount_lbl" xml:lang="en-US">Stock Repurchase Program Remaining Authorized Repurchase Amount</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount_lbl" xml:lang="en-US">Capacity available for additional repurchase of outstanding common stock</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CommonStockCapitalSharesReservedForFutureIssuance" xlink:label="us-gaap_CommonStockCapitalSharesReservedForFutureIssuance" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockCapitalSharesReservedForFutureIssuance" xlink:to="us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_lbl" xml:lang="en-US">Common Stock, Capital Shares Reserved for Future Issuance</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_lbl" xml:lang="en-US">Reserved stocks for issuance</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_MaximumOptionalCashInvestments" xlink:label="cli_MaximumOptionalCashInvestments" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_MaximumOptionalCashInvestments" xlink:to="cli_MaximumOptionalCashInvestments_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_MaximumOptionalCashInvestments_lbl" xml:lang="en-US">Maximum optional cash investments</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_MaximumOptionalCashInvestments_lbl" xml:lang="en-US">Maximum Optional Cash Investments</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_MaximumOptionalCashInvestments_lbl" xml:lang="en-US">Maximum cash investments</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwoThousandFourIncentiveStockPlanMember" xlink:label="cli_TwoThousandFourIncentiveStockPlanMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwoThousandFourIncentiveStockPlanMember" xlink:to="cli_TwoThousandFourIncentiveStockPlanMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwoThousandFourIncentiveStockPlanMember_lbl" xml:lang="en-US">2004 Incentive Stock Plan</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwoThousandFourIncentiveStockPlanMember_lbl" xml:lang="en-US">Two Thousand Four Incentive Stock Plan [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwoThousandFourIncentiveStockPlanMember_lbl" xml:lang="en-US">2004 Incentive Stock Plan [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_EmployeePlanMember" xlink:label="cli_EmployeePlanMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_EmployeePlanMember" xlink:to="cli_EmployeePlanMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_EmployeePlanMember_lbl" xml:lang="en-US">Employee Plan [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_EmployeePlanMember_lbl" xml:lang="en-US">Employee Plan [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_EmployeePlanMember_lbl" xml:lang="en-US">Employee Plan [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwoThousandEmployeePlanMember" xlink:label="cli_TwoThousandEmployeePlanMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwoThousandEmployeePlanMember" xlink:to="cli_TwoThousandEmployeePlanMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwoThousandEmployeePlanMember_lbl" xml:lang="en-US">2000 Employee Plan [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwoThousandEmployeePlanMember_lbl" xml:lang="en-US">Two Thousand Employee Plan [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwoThousandEmployeePlanMember_lbl" xml:lang="en-US">2000 Employee Plan [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwoThousandDirectorPlanMember" xlink:label="cli_TwoThousandDirectorPlanMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwoThousandDirectorPlanMember" xlink:to="cli_TwoThousandDirectorPlanMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwoThousandDirectorPlanMember_lbl" xml:lang="en-US">2000 Director Plan [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwoThousandDirectorPlanMember_lbl" xml:lang="en-US">Two Thousand Director Plan [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwoThousandDirectorPlanMember_lbl" xml:lang="en-US">2000 Director Plan [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_DirectorPlanMember" xlink:label="cli_DirectorPlanMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_DirectorPlanMember" xlink:to="cli_DirectorPlanMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_DirectorPlanMember_lbl" xml:lang="en-US">Director Plan [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_DirectorPlanMember_lbl" xml:lang="en-US">Director Plan [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_DirectorPlanMember_lbl" xml:lang="en-US">Director Plan [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_EmployeeAndDirectorPlanMember" xlink:label="cli_EmployeeAndDirectorPlanMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_EmployeeAndDirectorPlanMember" xlink:to="cli_EmployeeAndDirectorPlanMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_EmployeeAndDirectorPlanMember_lbl" xml:lang="en-US">Employee And Director Plan [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_EmployeeAndDirectorPlanMember_lbl" xml:lang="en-US">Employee And Director Plan [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_EmployeeAndDirectorPlanMember_lbl" xml:lang="en-US">Employee And Director Plan [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneNineNineFourEmployeePlanMember" xlink:label="cli_OneNineNineFourEmployeePlanMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneNineNineFourEmployeePlanMember" xlink:to="cli_OneNineNineFourEmployeePlanMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneNineNineFourEmployeePlanMember_lbl" xml:lang="en-US">One Nine Nine Four Employee Plan [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneNineNineFourEmployeePlanMember_lbl" xml:lang="en-US">One Nine Nine Four Employee Plan [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneNineNineFourEmployeePlanMember_lbl" xml:lang="en-US">1994 And 1995 Employee Plans [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwoThousandDirectorPlanAndDirectorPlanMember" xlink:label="cli_TwoThousandDirectorPlanAndDirectorPlanMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwoThousandDirectorPlanAndDirectorPlanMember" xlink:to="cli_TwoThousandDirectorPlanAndDirectorPlanMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwoThousandDirectorPlanAndDirectorPlanMember_lbl" xml:lang="en-US">2000 Director Plan And Director Plan [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwoThousandDirectorPlanAndDirectorPlanMember_lbl" xml:lang="en-US">Two Thousand Director Plan And Director Plan [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwoThousandDirectorPlanAndDirectorPlanMember_lbl" xml:lang="en-US">2000 Director Plan And Director Plan [Member]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod_lbl" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod_lbl" xml:lang="en-US">Exercisable time period (years)</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_StockOptionTerms" xlink:label="cli_StockOptionTerms" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_StockOptionTerms" xlink:to="cli_StockOptionTerms_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_StockOptionTerms_lbl" xml:lang="en-US">Stock option terms, years.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_StockOptionTerms_lbl" xml:lang="en-US">Stock Option Terms</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="cli_StockOptionTerms_lbl" xml:lang="en-US">Stock option terms (years)</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageRemainingContractualTerm1" xlink:label="us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageRemainingContractualTerm1" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageRemainingContractualTerm1" xlink:to="us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageRemainingContractualTerm1_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageRemainingContractualTerm1_lbl" xml:lang="en-US">Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Remaining Contractual Term</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageRemainingContractualTerm1_lbl" xml:lang="en-US">Weighted average remaining contractual life (years)</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_lbl" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_lbl" xml:lang="en-US">Total intrinsic value of options exercised</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized" xlink:to="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_lbl" xml:lang="en-US">Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_lbl" xml:lang="en-US">Total unrecognized compensation cost</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition" xlink:to="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition_lbl" xml:lang="en-US">Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition_lbl" xml:lang="en-US">Cost to be recognized, weighted average period, in years</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis" xlink:to="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_lbl" xml:lang="en-US">Antidilutive Securities Excluded from Computation of Earnings Per Share, by Antidilutive Securities [Axis]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AntidilutiveSecuritiesNameDomain" xlink:label="us-gaap_AntidilutiveSecuritiesNameDomain" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AntidilutiveSecuritiesNameDomain" xlink:to="us-gaap_AntidilutiveSecuritiesNameDomain_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_AntidilutiveSecuritiesNameDomain_lbl" xml:lang="en-US">Antidilutive Securities Name [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_AntidilutiveSecuritiesNameDomain_lbl" xml:lang="en-US">Antidilutive Securities, Name [Domain]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RestrictedStockMember" xlink:label="us-gaap_RestrictedStockMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestrictedStockMember" xlink:to="us-gaap_RestrictedStockMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RestrictedStockMember_lbl" xml:lang="en-US">Restricted Stock [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RestrictedStockMember_lbl" xml:lang="en-US">Restricted Stock [Member]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ContingentlyIssuableSharesMember" xlink:label="us-gaap_ContingentlyIssuableSharesMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ContingentlyIssuableSharesMember" xlink:to="us-gaap_ContingentlyIssuableSharesMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ContingentlyIssuableSharesMember_lbl" xml:lang="en-US">Contingently Issuable Shares [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ContingentlyIssuableSharesMember_lbl" xml:lang="en-US">Contingently Issuable Shares [Member]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_lbl" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award [Line Items]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_RestrictedStockAwardVestingPeriodMinimum" xlink:label="cli_RestrictedStockAwardVestingPeriodMinimum" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_RestrictedStockAwardVestingPeriodMinimum" xlink:to="cli_RestrictedStockAwardVestingPeriodMinimum_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_RestrictedStockAwardVestingPeriodMinimum_lbl" xml:lang="en-US">Restricted Stock Award Vesting Period, Minimum.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_RestrictedStockAwardVestingPeriodMinimum_lbl" xml:lang="en-US">Restricted Stock Award Vesting Period Minimum</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="cli_RestrictedStockAwardVestingPeriodMinimum_lbl" xml:lang="en-US">Restricted Stock Award vesting period, minimum (years)</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_RestrictedStockAwardVestingPeriodMaximum" xlink:label="cli_RestrictedStockAwardVestingPeriodMaximum" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_RestrictedStockAwardVestingPeriodMaximum" xlink:to="cli_RestrictedStockAwardVestingPeriodMaximum_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_RestrictedStockAwardVestingPeriodMaximum_lbl" xml:lang="en-US">Restricted Stock Award Vesting Period, Maximum</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_RestrictedStockAwardVestingPeriodMaximum_lbl" xml:lang="en-US">Restricted Stock Award Vesting Period, Maximum</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="cli_RestrictedStockAwardVestingPeriodMaximum_lbl" xml:lang="en-US">Restricted Stock Award vesting period, maximum (years)</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_RestrictedStockAwardsUnvestedSharesOutstandingPerformanceContingent" xlink:label="cli_RestrictedStockAwardsUnvestedSharesOutstandingPerformanceContingent" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_RestrictedStockAwardsUnvestedSharesOutstandingPerformanceContingent" xlink:to="cli_RestrictedStockAwardsUnvestedSharesOutstandingPerformanceContingent_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_RestrictedStockAwardsUnvestedSharesOutstandingPerformanceContingent_lbl" xml:lang="en-US">The number of unvested restricted stock award shares issued and outstanding contingent upon performance.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_RestrictedStockAwardsUnvestedSharesOutstandingPerformanceContingent_lbl" xml:lang="en-US">Restricted Stock Awards Unvested Shares Outstanding Performance Contingent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_RestrictedStockAwardsUnvestedSharesOutstandingPerformanceContingent_lbl" xml:lang="en-US">Restricted stock awards unvested shares outstanding performance contingent</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_lbl" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_lbl" xml:lang="en-US">Shares, Outstanding ending balance</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_lbl" xml:lang="en-US">Shares, Outstanding, beginning balance</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_lbl" xml:lang="en-US">Unvested restricted stock outstanding</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ShareholdersEquityLineItems_lbl" xml:lang="en-US">Shareholders Equity [Line Items]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_lbl" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice_lbl" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice_lbl" xml:lang="en-US">Weighted Average Exercise Price - Lapsed or Cancelled</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_lbl" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_lbl" xml:lang="en-US">Aggregate Intrinsic Value, Outstanding, ending balance</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_lbl" xml:lang="en-US">Aggregate Intrinsic Value, Outstanding, beginning balance</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_lbl" xml:lang="en-US">Aggregate intrinsic value</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions" xlink:label="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions" xlink:to="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions_lbl" xml:lang="en-US">Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions_lbl" xml:lang="en-US">Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options, Ending Balance</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions_lbl" xml:lang="en-US">Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options, Beginning Balance</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions_lbl" xml:lang="en-US">Shares Under Options - Options exercisable</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant" xlink:to="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_lbl" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_lbl" xml:lang="en-US">Shares Under Options - Available for grant</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1" xlink:to="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_lbl" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_lbl" xml:lang="en-US">Option exercisable, Aggregate Intrinsic Value</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit" xlink:label="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit" xlink:to="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit_lbl" xml:lang="en-US">Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit_lbl" xml:lang="en-US">Outstanding stock option price range, lower range</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit" xlink:label="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit" xlink:to="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit_lbl" xml:lang="en-US">Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit_lbl" xml:lang="en-US">Outstanding stock option price range, upper range</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncomeLossFromContinuingOperations" xlink:label="us-gaap_IncomeLossFromContinuingOperations" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeLossFromContinuingOperations" xlink:to="us-gaap_IncomeLossFromContinuingOperations_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_IncomeLossFromContinuingOperations_lbl" xml:lang="en-US">Income (Loss) from Continuing Operations Attributable to Parent</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_IncomeLossFromContinuingOperations_lbl" xml:lang="en-US">Income Loss From Continuing Operations</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_IncomeLossFromContinuingOperations_lbl" xml:lang="en-US">Income from continuing operations available to common shareholders</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_IncomeLossFromDiscontinuedOperationsAvailableToCommonShareholders" xlink:label="cli_IncomeLossFromDiscontinuedOperationsAvailableToCommonShareholders" />
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_IncomeLossFromDiscontinuedOperationsAvailableToCommonShareholders_lbl" xml:lang="en-US">Income Loss From Discontinued Operations Available To Common Shareholders</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_IncomeLossFromDiscontinuedOperationsAvailableToCommonShareholders_lbl" xml:lang="en-US">Income Loss From Discontinued Operations Available To Common Shareholders</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="cli_IncomeLossFromDiscontinuedOperationsAvailableToCommonShareholders_lbl" xml:lang="en-US">Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax, Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="cli_IncomeLossFromDiscontinuedOperationsAvailableToCommonShareholders_lbl" xml:lang="en-US">Income (loss) from discontinued operations available to common shareholders</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_IncomeLossFromContinuingOperationsDiluted" xlink:label="cli_IncomeLossFromContinuingOperationsDiluted" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_IncomeLossFromContinuingOperationsDiluted" xlink:to="cli_IncomeLossFromContinuingOperationsDiluted_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_IncomeLossFromContinuingOperationsDiluted_lbl" xml:lang="en-US">Income Loss From Continuing Operations Diluted</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_IncomeLossFromContinuingOperationsDiluted_lbl" xml:lang="en-US">Income Loss From Continuing Operations Diluted</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="cli_IncomeLossFromContinuingOperationsDiluted_lbl" xml:lang="en-US">Income from continuing operations for diluted earnings per share</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted" />
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_lbl" xml:lang="en-US">Net Income (Loss) Available to Common Stockholders, Diluted</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_lbl" xml:lang="en-US">Net Income (Loss) Available to Common Stockholders, Diluted, Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted_lbl" xml:lang="en-US">Net income available to common shareholders</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_CommonUnits" xlink:label="cli_CommonUnits" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_CommonUnits" xlink:to="cli_CommonUnits_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_CommonUnits_lbl" xml:lang="en-US">Common units.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_CommonUnits_lbl" xml:lang="en-US">Common Units</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="cli_CommonUnits_lbl" xml:lang="en-US">Add: Operating Partnership - common units</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_StockOptions" xlink:label="cli_StockOptions" />
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_StockOptions_lbl" xml:lang="en-US">Stock Options</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_StockOptions_lbl" xml:lang="en-US">Stock Options</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_StockOptions_lbl" xml:lang="en-US">Stock options</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_RestrictedStockAwardsShares" xlink:label="cli_RestrictedStockAwardsShares" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_RestrictedStockAwardsShares" xlink:to="cli_RestrictedStockAwardsShares_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_RestrictedStockAwardsShares_lbl" xml:lang="en-US">Restricted Stock Awards, shares.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_RestrictedStockAwardsShares_lbl" xml:lang="en-US">Restricted Stock Awards Shares</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="cli_RestrictedStockAwardsShares_lbl" xml:lang="en-US">Restricted Stock Awards</label>
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    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="us-gaap_StatementClassOfStockAxis" />
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StatementClassOfStockAxis_lbl" xml:lang="en-US">Class of Stock [Axis]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ClassOfStockDomain" xlink:label="us-gaap_ClassOfStockDomain" />
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ClassOfStockDomain_lbl" xml:lang="en-US">Class Of Stock [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ClassOfStockDomain_lbl" xml:lang="en-US">Class of Stock [Domain]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_SeriesCCumulativeRedeemablePerpetualPreferredStockMember_lbl" xml:lang="en-US">Series C Cumulative Redeemable Perpetual Preferred Stock [Member]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredUnitsByNameAxis_lbl" xml:lang="en-US">Preferred Units by Name [Axis]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PreferredUnitsClassDomain" xlink:label="us-gaap_PreferredUnitsClassDomain" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredUnitsClassDomain" xlink:to="us-gaap_PreferredUnitsClassDomain_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_PreferredUnitsClassDomain_lbl" xml:lang="en-US">Preferred Units Class [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_PreferredUnitsClassDomain_lbl" xml:lang="en-US">Preferred Units, Class [Domain]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SeriesCPreferredStockMember" xlink:label="us-gaap_SeriesCPreferredStockMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SeriesCPreferredStockMember" xlink:to="us-gaap_SeriesCPreferredStockMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SeriesCPreferredStockMember_lbl" xml:lang="en-US">Series C Preferred Stock [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SeriesCPreferredStockMember_lbl" xml:lang="en-US">Series C Preferred Stock [Member]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MinorityInterestLineItems" xlink:label="us-gaap_MinorityInterestLineItems" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MinorityInterestLineItems" xlink:to="us-gaap_MinorityInterestLineItems_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MinorityInterestLineItems_lbl" xml:lang="en-US">Noncontrolling Interest [Line Items]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_PreferredUnitValue" xlink:label="cli_PreferredUnitValue" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_PreferredUnitValue" xlink:to="cli_PreferredUnitValue_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_PreferredUnitValue_lbl" xml:lang="en-US">Value of the preferred units acquired</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_PreferredUnitValue_lbl" xml:lang="en-US">Preferred Unit Value</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_PreferredUnitValue_lbl" xml:lang="en-US">Preferred unit in operating partnership</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_RebalanceOfOwnershipPercentage" xlink:label="cli_RebalanceOfOwnershipPercentage" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_RebalanceOfOwnershipPercentage" xlink:to="cli_RebalanceOfOwnershipPercentage_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_RebalanceOfOwnershipPercentage_lbl" xml:lang="en-US">Rebalance Of Ownership Percentage</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_RebalanceOfOwnershipPercentage_lbl" xml:lang="en-US">Rebalance Of Ownership Percentage</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="cli_RebalanceOfOwnershipPercentage_lbl" xml:lang="en-US">Rebalance of ownership percentage</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners" xlink:label="us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners" xlink:to="us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners_lbl" xml:lang="en-US">Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners_lbl" xml:lang="en-US">Percentage of noncontrolling interest</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SquareFootageOfRealEstateProperty" xlink:label="us-gaap_SquareFootageOfRealEstateProperty" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SquareFootageOfRealEstateProperty" xlink:to="us-gaap_SquareFootageOfRealEstateProperty_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SquareFootageOfRealEstateProperty_lbl" xml:lang="en-US">Square Footage of Real Estate Property</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SquareFootageOfRealEstateProperty_lbl" xml:lang="en-US">Square footage of office buildings</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_SquareFootageOfRealEstateProperty_lbl" xml:lang="en-US">Lease of property in square feet</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_DistributionOfCashFlowToIndividualCompaniesPercentage" xlink:label="cli_DistributionOfCashFlowToIndividualCompaniesPercentage" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_DistributionOfCashFlowToIndividualCompaniesPercentage" xlink:to="cli_DistributionOfCashFlowToIndividualCompaniesPercentage_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_DistributionOfCashFlowToIndividualCompaniesPercentage_lbl" xml:lang="en-US">Distribution of cash flow to individual companies percentage</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_DistributionOfCashFlowToIndividualCompaniesPercentage_lbl" xml:lang="en-US">Distribution Of Cash Flow To Individual Companies Percentage</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_DistributionOfCashFlowToIndividualCompaniesPercentage_lbl" xml:lang="en-US">Excess net cash flow remaining after the distribution to the Company</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_CommonUnitsRedeemedForCommonShares" xlink:label="cli_CommonUnitsRedeemedForCommonShares" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_CommonUnitsRedeemedForCommonShares" xlink:to="cli_CommonUnitsRedeemedForCommonShares_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_CommonUnitsRedeemedForCommonShares_lbl" xml:lang="en-US">Common Units Redeemed For Common Shares</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_CommonUnitsRedeemedForCommonShares_lbl" xml:lang="en-US">Common Units Redeemed For Common Shares</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="cli_CommonUnitsRedeemedForCommonShares_lbl" xml:lang="en-US">Redemption of common units for shares of common stock</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:label="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:to="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_lbl" xml:lang="en-US">Schedule of Segment Reporting Information, by Segment [Table]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis" xlink:label="us-gaap_StatementBusinessSegmentsAxis" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementBusinessSegmentsAxis" xlink:to="us-gaap_StatementBusinessSegmentsAxis_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StatementBusinessSegmentsAxis_lbl" xml:lang="en-US">Statement, Business Segments [Axis]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SegmentDomain" xlink:label="us-gaap_SegmentDomain" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SegmentDomain" xlink:to="us-gaap_SegmentDomain_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SegmentDomain_lbl" xml:lang="en-US">Segment [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_SegmentDomain_lbl" xml:lang="en-US">Segment [Domain]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RealEstateMember" xlink:label="us-gaap_RealEstateMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RealEstateMember" xlink:to="us-gaap_RealEstateMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RealEstateMember_lbl" xml:lang="en-US">Real Estate [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RealEstateMember_lbl" xml:lang="en-US">Real Estate [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ConstructionServicesMember" xlink:label="cli_ConstructionServicesMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ConstructionServicesMember" xlink:to="cli_ConstructionServicesMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ConstructionServicesMember_lbl" xml:lang="en-US">Construction Services [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ConstructionServicesMember_lbl" xml:lang="en-US">Construction Services [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ConstructionServicesMember_lbl" xml:lang="en-US">Construction Services [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_CorporateAndOtherMember" xlink:label="cli_CorporateAndOtherMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_CorporateAndOtherMember" xlink:to="cli_CorporateAndOtherMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_CorporateAndOtherMember_lbl" xml:lang="en-US">Corporate And Other [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_CorporateAndOtherMember_lbl" xml:lang="en-US">Corporate And Other [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_CorporateAndOtherMember_lbl" xml:lang="en-US">Corporate &amp; Other [Member]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="us-gaap_SegmentReportingInformationLineItems" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SegmentReportingInformationLineItems" xlink:to="us-gaap_SegmentReportingInformationLineItems_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_SegmentReportingInformationLineItems_lbl" xml:lang="en-US">Segment Reporting Information [Line Items]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OperatingAndInterestExpenses" xlink:label="cli_OperatingAndInterestExpenses" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OperatingAndInterestExpenses" xlink:to="cli_OperatingAndInterestExpenses_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OperatingAndInterestExpenses_lbl" xml:lang="en-US">Total operating and interest expenses.</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OperatingAndInterestExpenses_lbl" xml:lang="en-US">Operating And Interest Expenses</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="cli_OperatingAndInterestExpenses_lbl" xml:lang="en-US">Total operating and interest expenses</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_NetOperatingIncome" xlink:label="cli_NetOperatingIncome" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_NetOperatingIncome" xlink:to="cli_NetOperatingIncome_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_NetOperatingIncome_lbl" xml:lang="en-US">Net Operating Income</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_NetOperatingIncome_lbl" xml:lang="en-US">Net Operating Income</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_NetOperatingIncome_lbl" xml:lang="en-US">Net operating income (loss)</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_LongLivedAssets" xlink:label="cli_LongLivedAssets" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_LongLivedAssets" xlink:to="cli_LongLivedAssets_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_LongLivedAssets_lbl" xml:lang="en-US">Long Lived Assets</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_LongLivedAssets_lbl" xml:lang="en-US">Long Lived Assets</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_LongLivedAssets_lbl" xml:lang="en-US">Total long-lived assets</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_lbl" xml:lang="en-US">Schedule of Related Party Transactions, by Related Party [Table]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="us-gaap_RelatedPartyTransactionLineItems" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_RelatedPartyTransactionLineItems_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RelatedPartyTransactionLineItems_lbl" xml:lang="en-US">Related Party Transaction [Line Items]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_NumberOfClassPropertiesAcquired" xlink:label="cli_NumberOfClassPropertiesAcquired" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_NumberOfClassPropertiesAcquired" xlink:to="cli_NumberOfClassPropertiesAcquired_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_NumberOfClassPropertiesAcquired_lbl" xml:lang="en-US">Number Of Class Properties Acquired</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_NumberOfClassPropertiesAcquired_lbl" xml:lang="en-US">Number Of Class Properties Acquired</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_NumberOfClassPropertiesAcquired_lbl" xml:lang="en-US">Number of class properties acquired</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DueFromRelatedParties" xlink:label="us-gaap_DueFromRelatedParties" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DueFromRelatedParties" xlink:to="us-gaap_DueFromRelatedParties_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DueFromRelatedParties_lbl" xml:lang="en-US">Due from Related Parties</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_DueFromRelatedParties_lbl" xml:lang="en-US">Due from Related Parties, Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:label="us-gaap_DueFromRelatedParties_lbl" xml:lang="en-US">Due from related parties</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RelatedPartyTransactionRevenuesFromTransactionsWithRelatedParty" xlink:label="us-gaap_RelatedPartyTransactionRevenuesFromTransactionsWithRelatedParty" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyTransactionRevenuesFromTransactionsWithRelatedParty" xlink:to="us-gaap_RelatedPartyTransactionRevenuesFromTransactionsWithRelatedParty_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RelatedPartyTransactionRevenuesFromTransactionsWithRelatedParty_lbl" xml:lang="en-US">Related Party Transaction, Revenues from Transactions with Related Party</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RelatedPartyTransactionRevenuesFromTransactionsWithRelatedParty_lbl" xml:lang="en-US">Revenue under lease</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ReimbursementRevenue" xlink:label="us-gaap_ReimbursementRevenue" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ReimbursementRevenue" xlink:to="us-gaap_ReimbursementRevenue_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_ReimbursementRevenue_lbl" xml:lang="en-US">Reimbursement Revenue</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_ReimbursementRevenue_lbl" xml:lang="en-US">Reimbursement revenue</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OperatingAndOtherExpenses" xlink:label="cli_OperatingAndOtherExpenses" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OperatingAndOtherExpenses" xlink:to="cli_OperatingAndOtherExpenses_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OperatingAndOtherExpenses_lbl" xml:lang="en-US">Operating and other expenses</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OperatingAndOtherExpenses_lbl" xml:lang="en-US">Operating And Other Expenses</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OperatingAndOtherExpenses_lbl" xml:lang="en-US">Operating and other expenses</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityAddressesTable" xlink:label="dei_EntityAddressesTable" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressesTable" xlink:to="dei_EntityAddressesTable_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityAddressesTable_lbl" xml:lang="en-US">Entity Addresses [Table]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ProjectsUnderDevelopmentAndDevelopableLandMember" xlink:label="cli_ProjectsUnderDevelopmentAndDevelopableLandMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ProjectsUnderDevelopmentAndDevelopableLandMember" xlink:to="cli_ProjectsUnderDevelopmentAndDevelopableLandMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ProjectsUnderDevelopmentAndDevelopableLandMember_lbl" xml:lang="en-US">Projects Under Development And Developable Land [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ProjectsUnderDevelopmentAndDevelopableLandMember_lbl" xml:lang="en-US">Projects Under Development And Developable Land [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ProjectsUnderDevelopmentAndDevelopableLandMember_lbl" xml:lang="en-US">Projects Under Development And Developable Land [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_EntityByCountyAxis" xlink:label="cli_EntityByCountyAxis" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_EntityByCountyAxis" xlink:to="cli_EntityByCountyAxis_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_EntityByCountyAxis_lbl" xml:lang="en-US">Entity By County [Axis]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_EntityByCountyAxis_lbl" xml:lang="en-US">Entity By County [Axis]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_EntityByCountyDomain" xlink:label="cli_EntityByCountyDomain" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_EntityByCountyDomain" xlink:to="cli_EntityByCountyDomain_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_EntityByCountyDomain_lbl" xml:lang="en-US">Entity By County [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_EntityByCountyDomain_lbl" xml:lang="en-US">Entity By County [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_EntityByCountyDomain_lbl" xml:lang="en-US">Entity By County [Domain]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_BergenCountyMember" xlink:label="cli_BergenCountyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_BergenCountyMember" xlink:to="cli_BergenCountyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_BergenCountyMember_lbl" xml:lang="en-US">Bergen County [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_BergenCountyMember_lbl" xml:lang="en-US">Bergen County [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_BergenCountyMember_lbl" xml:lang="en-US">Bergen County [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_BurlingtonCountyMember" xlink:label="cli_BurlingtonCountyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_BurlingtonCountyMember" xlink:to="cli_BurlingtonCountyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_BurlingtonCountyMember_lbl" xml:lang="en-US">Burlington County [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_BurlingtonCountyMember_lbl" xml:lang="en-US">Burlington County [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_BurlingtonCountyMember_lbl" xml:lang="en-US">Burlington County [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_GloucesterCountyMember" xlink:label="cli_GloucesterCountyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_GloucesterCountyMember" xlink:to="cli_GloucesterCountyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_GloucesterCountyMember_lbl" xml:lang="en-US">Gloucester County [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_GloucesterCountyMember_lbl" xml:lang="en-US">Gloucester County [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_GloucesterCountyMember_lbl" xml:lang="en-US">Gloucester County [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_EssexCountyMember" xlink:label="cli_EssexCountyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_EssexCountyMember" xlink:to="cli_EssexCountyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_EssexCountyMember_lbl" xml:lang="en-US">Essex County [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_EssexCountyMember_lbl" xml:lang="en-US">Essex County [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_EssexCountyMember_lbl" xml:lang="en-US">Essex County [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_HudsonCountyMember" xlink:label="cli_HudsonCountyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_HudsonCountyMember" xlink:to="cli_HudsonCountyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_HudsonCountyMember_lbl" xml:lang="en-US">Hudson County [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_HudsonCountyMember_lbl" xml:lang="en-US">Hudson County [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_HudsonCountyMember_lbl" xml:lang="en-US">Hudson County [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_MercerCountyMember" xlink:label="cli_MercerCountyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_MercerCountyMember" xlink:to="cli_MercerCountyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_MercerCountyMember_lbl" xml:lang="en-US">Mercer County [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_MercerCountyMember_lbl" xml:lang="en-US">Mercer County [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_MercerCountyMember_lbl" xml:lang="en-US">Mercer County [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_MiddlesexCountyMember" xlink:label="cli_MiddlesexCountyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_MiddlesexCountyMember" xlink:to="cli_MiddlesexCountyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_MiddlesexCountyMember_lbl" xml:lang="en-US">Middlesex County [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_MiddlesexCountyMember_lbl" xml:lang="en-US">Middlesex County [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_MiddlesexCountyMember_lbl" xml:lang="en-US">Middlesex County [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_MonmouthCountyMember" xlink:label="cli_MonmouthCountyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_MonmouthCountyMember" xlink:to="cli_MonmouthCountyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_MonmouthCountyMember_lbl" xml:lang="en-US">Monmouth County [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_MonmouthCountyMember_lbl" xml:lang="en-US">Monmouth County [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_MonmouthCountyMember_lbl" xml:lang="en-US">Monmouth County [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_MorrisCountyMember" xlink:label="cli_MorrisCountyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_MorrisCountyMember" xlink:to="cli_MorrisCountyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_MorrisCountyMember_lbl" xml:lang="en-US">Morris County  [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_MorrisCountyMember_lbl" xml:lang="en-US">Morris County [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_MorrisCountyMember_lbl" xml:lang="en-US">Morris County [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_PassaicCountyMember" xlink:label="cli_PassaicCountyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_PassaicCountyMember" xlink:to="cli_PassaicCountyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_PassaicCountyMember_lbl" xml:lang="en-US">Passaic County [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_PassaicCountyMember_lbl" xml:lang="en-US">Passaic County [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_PassaicCountyMember_lbl" xml:lang="en-US">Passaic County [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_SomersetCountyMember" xlink:label="cli_SomersetCountyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_SomersetCountyMember" xlink:to="cli_SomersetCountyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_SomersetCountyMember_lbl" xml:lang="en-US">Somerset County [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_SomersetCountyMember_lbl" xml:lang="en-US">Somerset County [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_SomersetCountyMember_lbl" xml:lang="en-US">Somerset County [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_UnionCountyMember" xlink:label="cli_UnionCountyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_UnionCountyMember" xlink:to="cli_UnionCountyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_UnionCountyMember_lbl" xml:lang="en-US">Union County [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_UnionCountyMember_lbl" xml:lang="en-US">Union County [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_UnionCountyMember_lbl" xml:lang="en-US">Union County [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_NewYorkCountyMember" xlink:label="cli_NewYorkCountyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_NewYorkCountyMember" xlink:to="cli_NewYorkCountyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_NewYorkCountyMember_lbl" xml:lang="en-US">New York County [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_NewYorkCountyMember_lbl" xml:lang="en-US">New York County [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_NewYorkCountyMember_lbl" xml:lang="en-US">New York County [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_RocklandCountyMember" xlink:label="cli_RocklandCountyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_RocklandCountyMember" xlink:to="cli_RocklandCountyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_RocklandCountyMember_lbl" xml:lang="en-US">Rockland County [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_RocklandCountyMember_lbl" xml:lang="en-US">Rockland County [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_RocklandCountyMember_lbl" xml:lang="en-US">Rockland County [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_WestchesterCountyMember" xlink:label="cli_WestchesterCountyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_WestchesterCountyMember" xlink:to="cli_WestchesterCountyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_WestchesterCountyMember_lbl" xml:lang="en-US">Westchester County [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_WestchesterCountyMember_lbl" xml:lang="en-US">Westchester County [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_WestchesterCountyMember_lbl" xml:lang="en-US">Westchester County [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ChesterCountyMember" xlink:label="cli_ChesterCountyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ChesterCountyMember" xlink:to="cli_ChesterCountyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ChesterCountyMember_lbl" xml:lang="en-US">Chester County [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ChesterCountyMember_lbl" xml:lang="en-US">Chester County [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ChesterCountyMember_lbl" xml:lang="en-US">Chester County [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_DelawareCountyMember" xlink:label="cli_DelawareCountyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_DelawareCountyMember" xlink:to="cli_DelawareCountyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_DelawareCountyMember_lbl" xml:lang="en-US">Delaware County [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_DelawareCountyMember_lbl" xml:lang="en-US">Delaware County [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_DelawareCountyMember_lbl" xml:lang="en-US">Delaware County [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_MontgomeryCountyMember" xlink:label="cli_MontgomeryCountyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_MontgomeryCountyMember" xlink:to="cli_MontgomeryCountyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_MontgomeryCountyMember_lbl" xml:lang="en-US">Montgomery County [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_MontgomeryCountyMember_lbl" xml:lang="en-US">Montgomery County [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_MontgomeryCountyMember_lbl" xml:lang="en-US">Montgomery County [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FairfieldCountyMember" xlink:label="cli_FairfieldCountyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FairfieldCountyMember" xlink:to="cli_FairfieldCountyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FairfieldCountyMember_lbl" xml:lang="en-US">Fairfield County [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FairfieldCountyMember_lbl" xml:lang="en-US">Fairfield County [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FairfieldCountyMember_lbl" xml:lang="en-US">Fairfield County [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_DistrictColumbiaMember" xlink:label="cli_DistrictColumbiaMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_DistrictColumbiaMember" xlink:to="cli_DistrictColumbiaMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_DistrictColumbiaMember_lbl" xml:lang="en-US">District Columbia [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_DistrictColumbiaMember_lbl" xml:lang="en-US">District Columbia [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_DistrictColumbiaMember_lbl" xml:lang="en-US">District Of Columbia [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_PrinceGeorgesCountyMember" xlink:label="cli_PrinceGeorgesCountyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_PrinceGeorgesCountyMember" xlink:to="cli_PrinceGeorgesCountyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_PrinceGeorgesCountyMember_lbl" xml:lang="en-US">Prince George's County [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_PrinceGeorgesCountyMember_lbl" xml:lang="en-US">Prince Georges County [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_PrinceGeorgesCountyMember_lbl" xml:lang="en-US">Prince George's County [Member]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityByLocationAxis" xlink:label="dei_EntityByLocationAxis" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityByLocationAxis" xlink:to="dei_EntityByLocationAxis_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityByLocationAxis_lbl" xml:lang="en-US">Entity by Location [Axis]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_LocationDomain" xlink:label="dei_LocationDomain" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_LocationDomain" xlink:to="dei_LocationDomain_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_LocationDomain_lbl" xml:lang="en-US">Location [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="dei_LocationDomain_lbl" xml:lang="en-US">Location [Domain]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FairLawnMember" xlink:label="cli_FairLawnMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FairLawnMember" xlink:to="cli_FairLawnMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FairLawnMember_lbl" xml:lang="en-US">Fair Lawn [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FairLawnMember_lbl" xml:lang="en-US">Fair Lawn [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FairLawnMember_lbl" xml:lang="en-US">Fair Lawn [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FortLeeMember" xlink:label="cli_FortLeeMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FortLeeMember" xlink:to="cli_FortLeeMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FortLeeMember_lbl" xml:lang="en-US">Fort Lee [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FortLeeMember_lbl" xml:lang="en-US">Fort Lee [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FortLeeMember_lbl" xml:lang="en-US">Fort Lee [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_LittleFerryMember" xlink:label="cli_LittleFerryMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_LittleFerryMember" xlink:to="cli_LittleFerryMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_LittleFerryMember_lbl" xml:lang="en-US">Little Ferry [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_LittleFerryMember_lbl" xml:lang="en-US">Little Ferry [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_LittleFerryMember_lbl" xml:lang="en-US">Little Ferry [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_LyndhurstMember" xlink:label="cli_LyndhurstMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_LyndhurstMember" xlink:to="cli_LyndhurstMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_LyndhurstMember_lbl" xml:lang="en-US">Lyndhurst [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_LyndhurstMember_lbl" xml:lang="en-US">Lyndhurst [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_LyndhurstMember_lbl" xml:lang="en-US">Lyndhurst [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_MontvaleMember" xlink:label="cli_MontvaleMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_MontvaleMember" xlink:to="cli_MontvaleMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_MontvaleMember_lbl" xml:lang="en-US">Montvale [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_MontvaleMember_lbl" xml:lang="en-US">Montvale [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_MontvaleMember_lbl" xml:lang="en-US">Montvale [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ParamusMember" xlink:label="cli_ParamusMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ParamusMember" xlink:to="cli_ParamusMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ParamusMember_lbl" xml:lang="en-US">Paramus [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ParamusMember_lbl" xml:lang="en-US">Paramus [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ParamusMember_lbl" xml:lang="en-US">Paramus [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_RochelleParkMember" xlink:label="cli_RochelleParkMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_RochelleParkMember" xlink:to="cli_RochelleParkMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_RochelleParkMember_lbl" xml:lang="en-US">Rochelle Park [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_RochelleParkMember_lbl" xml:lang="en-US">Rochelle Park [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_RochelleParkMember_lbl" xml:lang="en-US">Rochelle Park [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_UpperSaddleRiverMember" xlink:label="cli_UpperSaddleRiverMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_UpperSaddleRiverMember" xlink:to="cli_UpperSaddleRiverMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_UpperSaddleRiverMember_lbl" xml:lang="en-US">Upper Saddle River [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_UpperSaddleRiverMember_lbl" xml:lang="en-US">Upper Saddle River [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_UpperSaddleRiverMember_lbl" xml:lang="en-US">Upper Saddle River [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_WoodcliffLakeMember" xlink:label="cli_WoodcliffLakeMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_WoodcliffLakeMember" xlink:to="cli_WoodcliffLakeMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_WoodcliffLakeMember_lbl" xml:lang="en-US">Woodcliff Lake [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_WoodcliffLakeMember_lbl" xml:lang="en-US">Woodcliff Lake [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_WoodcliffLakeMember_lbl" xml:lang="en-US">Woodcliff Lake [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_BurlingtonMember" xlink:label="cli_BurlingtonMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_BurlingtonMember" xlink:to="cli_BurlingtonMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_BurlingtonMember_lbl" xml:lang="en-US">Burlington [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_BurlingtonMember_lbl" xml:lang="en-US">Burlington [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_BurlingtonMember_lbl" xml:lang="en-US">Burlington [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_MoorestownMember" xlink:label="cli_MoorestownMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_MoorestownMember" xlink:to="cli_MoorestownMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_MoorestownMember_lbl" xml:lang="en-US">Moorestown [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_MoorestownMember_lbl" xml:lang="en-US">Moorestown [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_MoorestownMember_lbl" xml:lang="en-US">Moorestown [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_WestDeptfordMember" xlink:label="cli_WestDeptfordMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_WestDeptfordMember" xlink:to="cli_WestDeptfordMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_WestDeptfordMember_lbl" xml:lang="en-US">West Deptford [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_WestDeptfordMember_lbl" xml:lang="en-US">West Deptford [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_WestDeptfordMember_lbl" xml:lang="en-US">West Deptford [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_MillburnMember" xlink:label="cli_MillburnMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_MillburnMember" xlink:to="cli_MillburnMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_MillburnMember_lbl" xml:lang="en-US">Millburn [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_MillburnMember_lbl" xml:lang="en-US">Millburn [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_MillburnMember_lbl" xml:lang="en-US">Millburn [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_RoselandMember" xlink:label="cli_RoselandMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_RoselandMember" xlink:to="cli_RoselandMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_RoselandMember_lbl" xml:lang="en-US">Roseland [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_RoselandMember_lbl" xml:lang="en-US">Roseland [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_RoselandMember_lbl" xml:lang="en-US">Roseland [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_JerseyCityMember" xlink:label="cli_JerseyCityMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_JerseyCityMember" xlink:to="cli_JerseyCityMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_JerseyCityMember_lbl" xml:lang="en-US">Jersey City [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_JerseyCityMember_lbl" xml:lang="en-US">Jersey City [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_JerseyCityMember_lbl" xml:lang="en-US">Jersey City [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_HamiltonTownshipMember" xlink:label="cli_HamiltonTownshipMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_HamiltonTownshipMember" xlink:to="cli_HamiltonTownshipMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_HamiltonTownshipMember_lbl" xml:lang="en-US">Hamilton Township [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_HamiltonTownshipMember_lbl" xml:lang="en-US">Hamilton Township [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_HamiltonTownshipMember_lbl" xml:lang="en-US">Hamilton Township [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_PrincetonMember" xlink:label="cli_PrincetonMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_PrincetonMember" xlink:to="cli_PrincetonMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_PrincetonMember_lbl" xml:lang="en-US">Princeton[Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_PrincetonMember_lbl" xml:lang="en-US">Princeton [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_PrincetonMember_lbl" xml:lang="en-US">Princeton[Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_EastBrunswickMember" xlink:label="cli_EastBrunswickMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_EastBrunswickMember" xlink:to="cli_EastBrunswickMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_EastBrunswickMember_lbl" xml:lang="en-US">East Brunswick [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_EastBrunswickMember_lbl" xml:lang="en-US">East Brunswick [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_EastBrunswickMember_lbl" xml:lang="en-US">East Brunswick [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_EdisonMember" xlink:label="cli_EdisonMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_EdisonMember" xlink:to="cli_EdisonMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_EdisonMember_lbl" xml:lang="en-US">Edison [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_EdisonMember_lbl" xml:lang="en-US">Edison [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_EdisonMember_lbl" xml:lang="en-US">Edison [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_PiscatawayMember" xlink:label="cli_PiscatawayMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_PiscatawayMember" xlink:to="cli_PiscatawayMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_PiscatawayMember_lbl" xml:lang="en-US">Piscataway [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_PiscatawayMember_lbl" xml:lang="en-US">Piscataway [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_PiscatawayMember_lbl" xml:lang="en-US">Piscataway [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_PlainsboroMember" xlink:label="cli_PlainsboroMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_PlainsboroMember" xlink:to="cli_PlainsboroMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_PlainsboroMember_lbl" xml:lang="en-US">Plainsboro [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_PlainsboroMember_lbl" xml:lang="en-US">Plainsboro [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_PlainsboroMember_lbl" xml:lang="en-US">Plainsboro [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_WoodbridgeMember" xlink:label="cli_WoodbridgeMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_WoodbridgeMember" xlink:to="cli_WoodbridgeMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_WoodbridgeMember_lbl" xml:lang="en-US">Woodbridge [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_WoodbridgeMember_lbl" xml:lang="en-US">Woodbridge [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_WoodbridgeMember_lbl" xml:lang="en-US">Woodbridge [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FreeholdMember" xlink:label="cli_FreeholdMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FreeholdMember" xlink:to="cli_FreeholdMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FreeholdMember_lbl" xml:lang="en-US">Freehold [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FreeholdMember_lbl" xml:lang="en-US">Freehold [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FreeholdMember_lbl" xml:lang="en-US">Freehold [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_HolmdelMember" xlink:label="cli_HolmdelMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_HolmdelMember" xlink:to="cli_HolmdelMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_HolmdelMember_lbl" xml:lang="en-US">Holmdel [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_HolmdelMember_lbl" xml:lang="en-US">Holmdel [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_HolmdelMember_lbl" xml:lang="en-US">Holmdel [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_MiddletownMember" xlink:label="cli_MiddletownMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_MiddletownMember" xlink:to="cli_MiddletownMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_MiddletownMember_lbl" xml:lang="en-US">Middletown [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_MiddletownMember_lbl" xml:lang="en-US">Middletown [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_MiddletownMember_lbl" xml:lang="en-US">Middletown [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_NeptuneMember" xlink:label="cli_NeptuneMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_NeptuneMember" xlink:to="cli_NeptuneMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_NeptuneMember_lbl" xml:lang="en-US">Neptune [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_NeptuneMember_lbl" xml:lang="en-US">Neptune [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_NeptuneMember_lbl" xml:lang="en-US">Neptune [Member]</label>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_WallTownshipMember" xlink:to="cli_WallTownshipMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_WallTownshipMember_lbl" xml:lang="en-US">Wall Township [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_WallTownshipMember_lbl" xml:lang="en-US">Wall Township [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_WallTownshipMember_lbl" xml:lang="en-US">Wall Township [Member]</label>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FlorhamParkMember" xlink:to="cli_FlorhamParkMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FlorhamParkMember_lbl" xml:lang="en-US">Florham Park [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FlorhamParkMember_lbl" xml:lang="en-US">Florham Park [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FlorhamParkMember_lbl" xml:lang="en-US">Florham Park [Member]</label>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_MorrisPlainsMember" xlink:to="cli_MorrisPlainsMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_MorrisPlainsMember_lbl" xml:lang="en-US">Morris Plains [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_MorrisPlainsMember_lbl" xml:lang="en-US">Morris Plains [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_MorrisPlainsMember_lbl" xml:lang="en-US">Morris Plains [Member]</label>
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    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_MorrisTownshipMember" xlink:to="cli_MorrisTownshipMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_MorrisTownshipMember_lbl" xml:lang="en-US">Morris Township [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_MorrisTownshipMember_lbl" xml:lang="en-US">Morris Township [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_MorrisTownshipMember_lbl" xml:lang="en-US">Morris Township [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ParsippanyMember" xlink:label="cli_ParsippanyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ParsippanyMember" xlink:to="cli_ParsippanyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ParsippanyMember_lbl" xml:lang="en-US">Parsippany [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ParsippanyMember_lbl" xml:lang="en-US">Parsippany [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ParsippanyMember_lbl" xml:lang="en-US">Parsippany [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_CliftonMember" xlink:label="cli_CliftonMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_CliftonMember" xlink:to="cli_CliftonMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_CliftonMember_lbl" xml:lang="en-US">Clifton [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_CliftonMember_lbl" xml:lang="en-US">Clifton [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_CliftonMember_lbl" xml:lang="en-US">Clifton [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TotowaMember" xlink:label="cli_TotowaMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TotowaMember" xlink:to="cli_TotowaMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TotowaMember_lbl" xml:lang="en-US">Totowa [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TotowaMember_lbl" xml:lang="en-US">Totowa [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TotowaMember_lbl" xml:lang="en-US">Totowa [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_BaskingRidgeMember" xlink:label="cli_BaskingRidgeMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_BaskingRidgeMember" xlink:to="cli_BaskingRidgeMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_BaskingRidgeMember_lbl" xml:lang="en-US">Basking Ridge [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_BaskingRidgeMember_lbl" xml:lang="en-US">Basking Ridge [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_BaskingRidgeMember_lbl" xml:lang="en-US">Basking Ridge [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_BernardsMember" xlink:label="cli_BernardsMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_BernardsMember" xlink:to="cli_BernardsMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_BernardsMember_lbl" xml:lang="en-US">Bernards [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_BernardsMember_lbl" xml:lang="en-US">Bernards [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_BernardsMember_lbl" xml:lang="en-US">Bernards [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_BranchburgMember" xlink:label="cli_BranchburgMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_BranchburgMember" xlink:to="cli_BranchburgMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_BranchburgMember_lbl" xml:lang="en-US">Branchburg [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_BranchburgMember_lbl" xml:lang="en-US">Branchburg [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_BranchburgMember_lbl" xml:lang="en-US">Branchburg [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_BridgewaterMember" xlink:label="cli_BridgewaterMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_BridgewaterMember" xlink:to="cli_BridgewaterMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_BridgewaterMember_lbl" xml:lang="en-US">Bridgewater [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_BridgewaterMember_lbl" xml:lang="en-US">Bridgewater [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_BridgewaterMember_lbl" xml:lang="en-US">Bridgewater [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_WarrenMember" xlink:label="cli_WarrenMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_WarrenMember" xlink:to="cli_WarrenMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_WarrenMember_lbl" xml:lang="en-US">Warren [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_WarrenMember_lbl" xml:lang="en-US">Warren [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_WarrenMember_lbl" xml:lang="en-US">Warren [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ClarkMember" xlink:label="cli_ClarkMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ClarkMember" xlink:to="cli_ClarkMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ClarkMember_lbl" xml:lang="en-US">Clark [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ClarkMember_lbl" xml:lang="en-US">Clark [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ClarkMember_lbl" xml:lang="en-US">Clark [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_CranfordMember" xlink:label="cli_CranfordMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_CranfordMember" xlink:to="cli_CranfordMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_CranfordMember_lbl" xml:lang="en-US">Cranford [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_CranfordMember_lbl" xml:lang="en-US">Cranford [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_CranfordMember_lbl" xml:lang="en-US">Cranford [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_NewProvidenceMember" xlink:label="cli_NewProvidenceMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_NewProvidenceMember" xlink:to="cli_NewProvidenceMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_NewProvidenceMember_lbl" xml:lang="en-US">New Providence [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_NewProvidenceMember_lbl" xml:lang="en-US">New Providence [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_NewProvidenceMember_lbl" xml:lang="en-US">New Providence [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_NewYorkMember" xlink:label="cli_NewYorkMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_NewYorkMember" xlink:to="cli_NewYorkMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_NewYorkMember_lbl" xml:lang="en-US">New York [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_NewYorkMember_lbl" xml:lang="en-US">New York [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_NewYorkMember_lbl" xml:lang="en-US">New York [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_SuffernMember" xlink:label="cli_SuffernMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_SuffernMember" xlink:to="cli_SuffernMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_SuffernMember_lbl" xml:lang="en-US">Suffern [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_SuffernMember_lbl" xml:lang="en-US">Suffern [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_SuffernMember_lbl" xml:lang="en-US">Suffern [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ElmsfordMember" xlink:label="cli_ElmsfordMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ElmsfordMember" xlink:to="cli_ElmsfordMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ElmsfordMember_lbl" xml:lang="en-US">Elmsford [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ElmsfordMember_lbl" xml:lang="en-US">Elmsford [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ElmsfordMember_lbl" xml:lang="en-US">Elmsford [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_HawthorneMember" xlink:label="cli_HawthorneMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_HawthorneMember" xlink:to="cli_HawthorneMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_HawthorneMember_lbl" xml:lang="en-US">Hawthorne [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_HawthorneMember_lbl" xml:lang="en-US">Hawthorne [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_HawthorneMember_lbl" xml:lang="en-US">Hawthorne [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TarrytownMember" xlink:label="cli_TarrytownMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TarrytownMember" xlink:to="cli_TarrytownMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TarrytownMember_lbl" xml:lang="en-US">Tarrytown [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TarrytownMember_lbl" xml:lang="en-US">Tarrytown [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TarrytownMember_lbl" xml:lang="en-US">Tarrytown [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_WhitePlainsMember" xlink:label="cli_WhitePlainsMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_WhitePlainsMember" xlink:to="cli_WhitePlainsMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_WhitePlainsMember_lbl" xml:lang="en-US">White Plains [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_WhitePlainsMember_lbl" xml:lang="en-US">White Plains [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_WhitePlainsMember_lbl" xml:lang="en-US">White Plains [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_YonkersMember" xlink:label="cli_YonkersMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_YonkersMember" xlink:to="cli_YonkersMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_YonkersMember_lbl" xml:lang="en-US">Yonkers [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_YonkersMember_lbl" xml:lang="en-US">Yonkers [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_YonkersMember_lbl" xml:lang="en-US">Yonkers [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_BerwynMember" xlink:label="cli_BerwynMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_BerwynMember" xlink:to="cli_BerwynMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_BerwynMember_lbl" xml:lang="en-US">Berwyn [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_BerwynMember_lbl" xml:lang="en-US">Berwyn [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_BerwynMember_lbl" xml:lang="en-US">Berwyn [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_LesterMember" xlink:label="cli_LesterMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_LesterMember" xlink:to="cli_LesterMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_LesterMember_lbl" xml:lang="en-US">Lester [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_LesterMember_lbl" xml:lang="en-US">Lester [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_LesterMember_lbl" xml:lang="en-US">Lester [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_MediaMember" xlink:label="cli_MediaMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_MediaMember" xlink:to="cli_MediaMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_MediaMember_lbl" xml:lang="en-US">Media [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_MediaMember_lbl" xml:lang="en-US">Media [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_MediaMember_lbl" xml:lang="en-US">Media [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_BalaCynwydMember" xlink:label="cli_BalaCynwydMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_BalaCynwydMember" xlink:to="cli_BalaCynwydMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_BalaCynwydMember_lbl" xml:lang="en-US">Bala Cynwyd [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_BalaCynwydMember_lbl" xml:lang="en-US">Bala Cynwyd [Member]</label>
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    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_BlueBellMember" xlink:label="cli_BlueBellMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_BlueBellMember" xlink:to="cli_BlueBellMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_BlueBellMember_lbl" xml:lang="en-US">Blue Bell [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_BlueBellMember_lbl" xml:lang="en-US">Blue Bell [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_BlueBellMember_lbl" xml:lang="en-US">Blue Bell [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_KingOfPrussiaMember" xlink:label="cli_KingOfPrussiaMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_KingOfPrussiaMember" xlink:to="cli_KingOfPrussiaMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_KingOfPrussiaMember_lbl" xml:lang="en-US">King of Prussia [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_KingOfPrussiaMember_lbl" xml:lang="en-US">King Of Prussia [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_KingOfPrussiaMember_lbl" xml:lang="en-US">King of Prussia [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_LowerProvidenceMember" xlink:label="cli_LowerProvidenceMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_LowerProvidenceMember" xlink:to="cli_LowerProvidenceMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_LowerProvidenceMember_lbl" xml:lang="en-US">Lower Providence [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_LowerProvidenceMember_lbl" xml:lang="en-US">Lower Providence [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_LowerProvidenceMember_lbl" xml:lang="en-US">Lower Providence [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_PlymouthMeetingMember" xlink:label="cli_PlymouthMeetingMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_PlymouthMeetingMember" xlink:to="cli_PlymouthMeetingMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_PlymouthMeetingMember_lbl" xml:lang="en-US">Plymouth Meeting [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_PlymouthMeetingMember_lbl" xml:lang="en-US">Plymouth Meeting [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_PlymouthMeetingMember_lbl" xml:lang="en-US">Plymouth Meeting [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_NorwalkMember" xlink:label="cli_NorwalkMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_NorwalkMember" xlink:to="cli_NorwalkMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_NorwalkMember_lbl" xml:lang="en-US">Norwalk [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_NorwalkMember_lbl" xml:lang="en-US">Norwalk [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_NorwalkMember_lbl" xml:lang="en-US">Norwalk [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_StamfordMember" xlink:label="cli_StamfordMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_StamfordMember" xlink:to="cli_StamfordMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_StamfordMember_lbl" xml:lang="en-US">Stamford [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_StamfordMember_lbl" xml:lang="en-US">Stamford [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_StamfordMember_lbl" xml:lang="en-US">Stamford [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_GreenbeltMember" xlink:label="cli_GreenbeltMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_GreenbeltMember" xlink:to="cli_GreenbeltMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_GreenbeltMember_lbl" xml:lang="en-US">Greenbelt [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_GreenbeltMember_lbl" xml:lang="en-US">Greenbelt [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_GreenbeltMember_lbl" xml:lang="en-US">Greenbelt [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_LamhamMember" xlink:label="cli_LamhamMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_LamhamMember" xlink:to="cli_LamhamMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_LamhamMember_lbl" xml:lang="en-US">Lamham [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_LamhamMember_lbl" xml:lang="en-US">Lamham [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_LamhamMember_lbl" xml:lang="en-US">Lanham [Member]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RealEstateAndAccumulatedDepreciationLineItems" xlink:label="us-gaap_RealEstateAndAccumulatedDepreciationLineItems" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RealEstateAndAccumulatedDepreciationLineItems" xlink:to="us-gaap_RealEstateAndAccumulatedDepreciationLineItems_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RealEstateAndAccumulatedDepreciationLineItems_lbl" xml:lang="en-US">Real Estate and Accumulated Depreciation [Line Items]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RealEstateAndAccumulatedDepreciationDateOfConstruction" xlink:label="us-gaap_RealEstateAndAccumulatedDepreciationDateOfConstruction" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RealEstateAndAccumulatedDepreciationDateOfConstruction" xlink:to="us-gaap_RealEstateAndAccumulatedDepreciationDateOfConstruction_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RealEstateAndAccumulatedDepreciationDateOfConstruction_lbl" xml:lang="en-US">Real Estate and Accumulated Depreciation, Date of Construction</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RealEstateAndAccumulatedDepreciationDateOfConstruction_lbl" xml:lang="en-US">Year Built</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RealEstateAndAccumulatedDepreciationDateAcquired" xlink:label="us-gaap_RealEstateAndAccumulatedDepreciationDateAcquired" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RealEstateAndAccumulatedDepreciationDateAcquired" xlink:to="us-gaap_RealEstateAndAccumulatedDepreciationDateAcquired_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RealEstateAndAccumulatedDepreciationDateAcquired_lbl" xml:lang="en-US">Real Estate and Accumulated Depreciation, Date Acquired</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RealEstateAndAccumulatedDepreciationDateAcquired_lbl" xml:lang="en-US">Year Acquired</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances" xlink:label="us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances" xlink:to="us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances_lbl" xml:lang="en-US">Real Estate and Accumulated Depreciation, Amount of Encumbrances</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RealEstateAndAccumulatedDepreciationAmountOfEncumbrances_lbl" xml:lang="en-US">Related Encumbrances</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand" xlink:label="us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand" xlink:to="us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand_lbl" xml:lang="en-US">Real Estate and Accumulated Depreciation, Initial Cost of Land</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfLand_lbl" xml:lang="en-US">Initial Costs, Land</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements" xlink:label="us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements" xlink:to="us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements_lbl" xml:lang="en-US">Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RealEstateAndAccumulatedDepreciationInitialCostOfBuildingsAndImprovements_lbl" xml:lang="en-US">Initial Costs, Building and Improvements</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts" xlink:label="us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts" xlink:to="us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts_lbl" xml:lang="en-US">Real Estate and Accumulated Depreciation, Costs Capitalized Subsequent to Acquisition, Carrying Costs</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RealEstateAndAccumulatedDepreciationCostsCapitalizedSubsequentToAcquisitionCarryingCosts_lbl" xml:lang="en-US">Costs Capitalized Subsequent to Acquisition</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand" xlink:label="us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand" xlink:to="us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand_lbl" xml:lang="en-US">Real Estate and Accumulated Depreciation, Carrying Amount of Land</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLand_lbl" xml:lang="en-US">Gross Amount at Which Carried at Close of Period, Land</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements" xlink:label="us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements" xlink:to="us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements_lbl" xml:lang="en-US">Real Estate and Accumulated Depreciation, Carrying Amount of Buildings and Improvements</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfBuildingsAndImprovements_lbl" xml:lang="en-US">Gross Amount at Which Carried at Close of Period, Building and Improvements</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovements" xlink:label="us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovements" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovements" xlink:to="us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovements_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovements_lbl" xml:lang="en-US">Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovements_lbl" xml:lang="en-US">Total</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:label="us-gaap_RealEstateAndAccumulatedDepreciationCarryingAmountOfLandAndBuildingsAndImprovements_lbl" xml:lang="en-US">Real Estate and Accumulated Depreciation, Carrying Amount of Land and Buildings and Improvements, Total</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RealEstateAndAccumulatedDepreciationAccumulatedDepreciation" xlink:label="us-gaap_RealEstateAndAccumulatedDepreciationAccumulatedDepreciation" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RealEstateAndAccumulatedDepreciationAccumulatedDepreciation" xlink:to="us-gaap_RealEstateAndAccumulatedDepreciationAccumulatedDepreciation_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RealEstateAndAccumulatedDepreciationAccumulatedDepreciation_lbl" xml:lang="en-US">Real Estate and Accumulated Depreciation, Accumulated Depreciation</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RealEstateAndAccumulatedDepreciationAccumulatedDepreciation_lbl" xml:lang="en-US">Accumulated Depreciation</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RealEstateFederalIncomeTaxBasis" xlink:label="us-gaap_RealEstateFederalIncomeTaxBasis" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RealEstateFederalIncomeTaxBasis" xlink:to="us-gaap_RealEstateFederalIncomeTaxBasis_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RealEstateFederalIncomeTaxBasis_lbl" xml:lang="en-US">Real Estate, Federal Income Tax Basis</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RealEstateFederalIncomeTaxBasis_lbl" xml:lang="en-US">Aggregate cost for federal income tax</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RealEstateAndAccumulatedDepreciationLifeUsedForDepreciation" xlink:label="us-gaap_RealEstateAndAccumulatedDepreciationLifeUsedForDepreciation" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RealEstateAndAccumulatedDepreciationLifeUsedForDepreciation" xlink:to="us-gaap_RealEstateAndAccumulatedDepreciationLifeUsedForDepreciation_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RealEstateAndAccumulatedDepreciationLifeUsedForDepreciation_lbl" xml:lang="en-US">Real Estate and Accumulated Depreciation, Life Used for Depreciation</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RealEstateAndAccumulatedDepreciationLifeUsedForDepreciation_lbl" xml:lang="en-US">Life used for depreciation, years</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RealEstateGrossAtCarryingValue" xlink:label="us-gaap_RealEstateGrossAtCarryingValue" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RealEstateGrossAtCarryingValue" xlink:to="us-gaap_RealEstateGrossAtCarryingValue_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RealEstateGrossAtCarryingValue_lbl" xml:lang="en-US">Real Estate, Gross</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_RealEstateGrossAtCarryingValue_lbl" xml:lang="en-US">Rental Properties, Balance at end of year</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_RealEstateGrossAtCarryingValue_lbl" xml:lang="en-US">Rental Properties, Balance at beginning of year</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RealEstateOtherAdditions" xlink:label="us-gaap_RealEstateOtherAdditions" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RealEstateOtherAdditions" xlink:to="us-gaap_RealEstateOtherAdditions_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RealEstateOtherAdditions_lbl" xml:lang="en-US">Real Estate, Other Additions</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RealEstateOtherAdditions_lbl" xml:lang="en-US">Rental Properties, Additions</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RealEstateCostOfRealEstateSold" xlink:label="us-gaap_RealEstateCostOfRealEstateSold" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RealEstateCostOfRealEstateSold" xlink:to="us-gaap_RealEstateCostOfRealEstateSold_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RealEstateCostOfRealEstateSold_lbl" xml:lang="en-US">Real Estate, Cost of Real Estate Sold</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RealEstateCostOfRealEstateSold_lbl" xml:lang="en-US">Rental Properties, Properties sold</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RealEstateOtherDeductions" xlink:label="us-gaap_RealEstateOtherDeductions" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RealEstateOtherDeductions" xlink:to="us-gaap_RealEstateOtherDeductions_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RealEstateOtherDeductions_lbl" xml:lang="en-US">Real Estate, Other Deductions</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RealEstateOtherDeductions_lbl" xml:lang="en-US">Rental Properties, Impairment charge on rental property</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_RealEstateRetirementsOrDisposals" xlink:label="cli_RealEstateRetirementsOrDisposals" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_RealEstateRetirementsOrDisposals" xlink:to="cli_RealEstateRetirementsOrDisposals_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_RealEstateRetirementsOrDisposals_lbl" xml:lang="en-US">Real Estate, Retirements or Disposals</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_RealEstateRetirementsOrDisposals_lbl" xml:lang="en-US">Real Estate, Retirements or Disposals</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_RealEstateRetirementsOrDisposals_lbl" xml:lang="en-US">Rental Properties, Retirements/disposals</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RealEstateAccumulatedDepreciation" xlink:label="us-gaap_RealEstateAccumulatedDepreciation" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RealEstateAccumulatedDepreciation" xlink:to="us-gaap_RealEstateAccumulatedDepreciation_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RealEstateAccumulatedDepreciation_lbl" xml:lang="en-US">Real Estate Accumulated Depreciation</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:label="us-gaap_RealEstateAccumulatedDepreciation_lbl" xml:lang="en-US">Accumulated Depreciation, Balance at end of year</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:label="us-gaap_RealEstateAccumulatedDepreciation_lbl" xml:lang="en-US">Accumulated Depreciation, Balance at beginning of year</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RealEstateAccumulatedDepreciationDepreciationExpense" xlink:label="us-gaap_RealEstateAccumulatedDepreciationDepreciationExpense" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RealEstateAccumulatedDepreciationDepreciationExpense" xlink:to="us-gaap_RealEstateAccumulatedDepreciationDepreciationExpense_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RealEstateAccumulatedDepreciationDepreciationExpense_lbl" xml:lang="en-US">Real Estate Accumulated Depreciation, Depreciation Expense</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RealEstateAccumulatedDepreciationDepreciationExpense_lbl" xml:lang="en-US">Accumulated Depreciation, Depreciation expense</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RealEstateAccumulatedDepreciationRealEstateSold" xlink:label="us-gaap_RealEstateAccumulatedDepreciationRealEstateSold" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RealEstateAccumulatedDepreciationRealEstateSold" xlink:to="us-gaap_RealEstateAccumulatedDepreciationRealEstateSold_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RealEstateAccumulatedDepreciationRealEstateSold_lbl" xml:lang="en-US">Real Estate Accumulated Depreciation, Real Estate Sold</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RealEstateAccumulatedDepreciationRealEstateSold_lbl" xml:lang="en-US">Accumulated Depreciation, Properties sold</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RealEstateAccumulatedDepreciationOtherDeductions" xlink:label="us-gaap_RealEstateAccumulatedDepreciationOtherDeductions" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RealEstateAccumulatedDepreciationOtherDeductions" xlink:to="us-gaap_RealEstateAccumulatedDepreciationOtherDeductions_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_RealEstateAccumulatedDepreciationOtherDeductions_lbl" xml:lang="en-US">Real Estate Accumulated Depreciation, Other Deductions</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_RealEstateAccumulatedDepreciationOtherDeductions_lbl" xml:lang="en-US">Accumulated Depreciation, Impairment charge on rental property</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_RealEstateAccumulatedDepreciationRetirementsOrDisposals" xlink:label="cli_RealEstateAccumulatedDepreciationRetirementsOrDisposals" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_RealEstateAccumulatedDepreciationRetirementsOrDisposals" xlink:to="cli_RealEstateAccumulatedDepreciationRetirementsOrDisposals_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_RealEstateAccumulatedDepreciationRetirementsOrDisposals_lbl" xml:lang="en-US">Real Estate Accumulated Depreciation Retirements or Disposals</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_RealEstateAccumulatedDepreciationRetirementsOrDisposals_lbl" xml:lang="en-US">Real Estate Accumulated Depreciation Retirements or Disposals</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_RealEstateAccumulatedDepreciationRetirementsOrDisposals_lbl" xml:lang="en-US">Accumulated Depreciation, Retirements/disposals</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_GaleAffiliateMember" xlink:label="cli_GaleAffiliateMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_GaleAffiliateMember" xlink:to="cli_GaleAffiliateMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_GaleAffiliateMember_lbl" xml:lang="en-US">Gale Affiliate [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_GaleAffiliateMember_lbl" xml:lang="en-US">Gale Affiliate [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_GaleAffiliateMember_lbl" xml:lang="en-US">Gale Affiliate [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_SevenPointSevenFivePercentSeniorUnsecuredNotesDueFebruaryFifteenTwoThousandElevenMember" xlink:label="cli_SevenPointSevenFivePercentSeniorUnsecuredNotesDueFebruaryFifteenTwoThousandElevenMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_SevenPointSevenFivePercentSeniorUnsecuredNotesDueFebruaryFifteenTwoThousandElevenMember" xlink:to="cli_SevenPointSevenFivePercentSeniorUnsecuredNotesDueFebruaryFifteenTwoThousandElevenMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_SevenPointSevenFivePercentSeniorUnsecuredNotesDueFebruaryFifteenTwoThousandElevenMember_lbl" xml:lang="en-US">Seven Point Seven Five Percent Senior Unsecured Notes Due February Fifteen Two Thousand Eleven [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_SevenPointSevenFivePercentSeniorUnsecuredNotesDueFebruaryFifteenTwoThousandElevenMember_lbl" xml:lang="en-US">Seven Point Seven Five Percent Senior Unsecured Notes Due February Fifteen Two Thousand Eleven [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_SevenPointSevenFivePercentSeniorUnsecuredNotesDueFebruaryFifteenTwoThousandElevenMember_lbl" xml:lang="en-US">7.75 % Senior Unsecured Notes Due February 15, 2011 [Member]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_VicePresidentMember" xlink:label="us-gaap_VicePresidentMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_VicePresidentMember" xlink:to="us-gaap_VicePresidentMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_VicePresidentMember_lbl" xml:lang="en-US">Vice President [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_VicePresidentMember_lbl" xml:lang="en-US">Vice President [Member]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAxis" xlink:label="us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAxis" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAxis" xlink:to="us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAxis_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAxis_lbl" xml:lang="en-US">Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits, by Title of Individual [Axis]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_TitleOfIndividualWithRelationshipToEntityDomain" xlink:label="us-gaap_TitleOfIndividualWithRelationshipToEntityDomain" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TitleOfIndividualWithRelationshipToEntityDomain" xlink:to="us-gaap_TitleOfIndividualWithRelationshipToEntityDomain_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_TitleOfIndividualWithRelationshipToEntityDomain_lbl" xml:lang="en-US">Title Of Individual With Relationship To Entity [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_TitleOfIndividualWithRelationshipToEntityDomain_lbl" xml:lang="en-US">Title of Individual with Relationship to Entity [Domain]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FiveExecutiveOfficersMember" xlink:label="cli_FiveExecutiveOfficersMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FiveExecutiveOfficersMember" xlink:to="cli_FiveExecutiveOfficersMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FiveExecutiveOfficersMember_lbl" xml:lang="en-US">Five Executive Officers [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FiveExecutiveOfficersMember_lbl" xml:lang="en-US">Five Executive Officers [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FiveExecutiveOfficersMember_lbl" xml:lang="en-US">Five Executive Officers [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FourExecutiveOfficersMember" xlink:label="cli_FourExecutiveOfficersMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FourExecutiveOfficersMember" xlink:to="cli_FourExecutiveOfficersMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FourExecutiveOfficersMember_lbl" xml:lang="en-US">Four Executive Officers [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FourExecutiveOfficersMember_lbl" xml:lang="en-US">Four Executive Officers [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FourExecutiveOfficersMember_lbl" xml:lang="en-US">Four Executive Officers [Member]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockOptionsMember" xlink:label="us-gaap_StockOptionsMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockOptionsMember" xlink:to="us-gaap_StockOptionsMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="us-gaap_StockOptionsMember_lbl" xml:lang="en-US">Stock Options [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="us-gaap_StockOptionsMember_lbl" xml:lang="en-US">Stock Options [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_RobertMartinMember" xlink:label="cli_RobertMartinMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_RobertMartinMember" xlink:to="cli_RobertMartinMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_RobertMartinMember_lbl" xml:lang="en-US">Robert Martin [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_RobertMartinMember_lbl" xml:lang="en-US">Robert Martin [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_RobertMartinMember_lbl" xml:lang="en-US">Robert Martin [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_RmcEntityMember" xlink:label="cli_RmcEntityMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_RmcEntityMember" xlink:to="cli_RmcEntityMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_RmcEntityMember_lbl" xml:lang="en-US">RMC Entity [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_RmcEntityMember_lbl" xml:lang="en-US">Rmc Entity [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_RmcEntityMember_lbl" xml:lang="en-US">RMC Entity [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_RmcEntitiesMember" xlink:label="cli_RmcEntitiesMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_RmcEntitiesMember" xlink:to="cli_RmcEntitiesMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_RmcEntitiesMember_lbl" xml:lang="en-US">RMC Entities [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_RmcEntitiesMember_lbl" xml:lang="en-US">Rmc Entities [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_RmcEntitiesMember_lbl" xml:lang="en-US">RMC Entities [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_CaliMember" xlink:label="cli_CaliMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_CaliMember" xlink:to="cli_CaliMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_CaliMember_lbl" xml:lang="en-US">Cali [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_CaliMember_lbl" xml:lang="en-US">Cali [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_CaliMember_lbl" xml:lang="en-US">Cali [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_MackMember" xlink:label="cli_MackMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_MackMember" xlink:to="cli_MackMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_MackMember_lbl" xml:lang="en-US">Mack [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_MackMember_lbl" xml:lang="en-US">Mack [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_MackMember_lbl" xml:lang="en-US">Mack [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_WashingtonMember" xlink:label="cli_WashingtonMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_WashingtonMember" xlink:to="cli_WashingtonMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_WashingtonMember_lbl" xml:lang="en-US">Washington [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_WashingtonMember_lbl" xml:lang="en-US">Washington [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_WashingtonMember_lbl" xml:lang="en-US">Washington [Member]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_EntityAddressesAddressTypeAxis" xlink:label="dei_EntityAddressesAddressTypeAxis" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressesAddressTypeAxis" xlink:to="dei_EntityAddressesAddressTypeAxis_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_EntityAddressesAddressTypeAxis_lbl" xml:lang="en-US">Entity Addresses, Address Type [Axis]</label>
    <loc xlink:type="locator" xlink:href="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd#dei_AddressTypeDomain" xlink:label="dei_AddressTypeDomain" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_AddressTypeDomain" xlink:to="dei_AddressTypeDomain_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="dei_AddressTypeDomain_lbl" xml:lang="en-US">Address Type [Domain]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="dei_AddressTypeDomain_lbl" xml:lang="en-US">Address Type [Domain]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_SeventeenToSeventeenRTETwoHundredEightNorthOfficePropertyMember" xlink:label="cli_SeventeenToSeventeenRTETwoHundredEightNorthOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_SeventeenToSeventeenRTETwoHundredEightNorthOfficePropertyMember" xlink:to="cli_SeventeenToSeventeenRTETwoHundredEightNorthOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_SeventeenToSeventeenRTETwoHundredEightNorthOfficePropertyMember_lbl" xml:lang="en-US">Seventeen To Seventeen R T E Two Hundred Eight North Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_SeventeenToSeventeenRTETwoHundredEightNorthOfficePropertyMember_lbl" xml:lang="en-US">Seventeen To Seventeen R T E Two Hundred Eight North Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_SeventeenToSeventeenRTETwoHundredEightNorthOfficePropertyMember_lbl" xml:lang="en-US">17-17 Rte 208 North [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneBridgePlazaOfficePropertyMember" xlink:label="cli_OneBridgePlazaOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneBridgePlazaOfficePropertyMember" xlink:to="cli_OneBridgePlazaOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneBridgePlazaOfficePropertyMember_lbl" xml:lang="en-US">One Bridge Plaza Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneBridgePlazaOfficePropertyMember_lbl" xml:lang="en-US">One Bridge Plaza Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneBridgePlazaOfficePropertyMember_lbl" xml:lang="en-US">One Bridge Plaza [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwoThousandFifteenLinwoodAvenueOfficePropertyMember" xlink:label="cli_TwoThousandFifteenLinwoodAvenueOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwoThousandFifteenLinwoodAvenueOfficePropertyMember" xlink:to="cli_TwoThousandFifteenLinwoodAvenueOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwoThousandFifteenLinwoodAvenueOfficePropertyMember_lbl" xml:lang="en-US">Two Thousand Fifteen Linwood Avenue Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwoThousandFifteenLinwoodAvenueOfficePropertyMember_lbl" xml:lang="en-US">Two Thousand Fifteen Linwood Avenue Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwoThousandFifteenLinwoodAvenueOfficePropertyMember_lbl" xml:lang="en-US">2115 Linwood Avenue [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwoHundredRiserRoadOfficePropertyMember" xlink:label="cli_TwoHundredRiserRoadOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwoHundredRiserRoadOfficePropertyMember" xlink:to="cli_TwoHundredRiserRoadOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwoHundredRiserRoadOfficePropertyMember_lbl" xml:lang="en-US">Two Hundred Riser Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwoHundredRiserRoadOfficePropertyMember_lbl" xml:lang="en-US">Two Hundred Riser Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwoHundredRiserRoadOfficePropertyMember_lbl" xml:lang="en-US">200 Riser Road [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwoHundredTenClayAvenueOfficePropertyMember" xlink:label="cli_TwoHundredTenClayAvenueOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwoHundredTenClayAvenueOfficePropertyMember" xlink:to="cli_TwoHundredTenClayAvenueOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwoHundredTenClayAvenueOfficePropertyMember_lbl" xml:lang="en-US">Two Hundred Ten Clay Avenue Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwoHundredTenClayAvenueOfficePropertyMember_lbl" xml:lang="en-US">Two Hundred Ten Clay Avenue Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwoHundredTenClayAvenueOfficePropertyMember_lbl" xml:lang="en-US">210 Clay Avenue [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_NintyFiveChestnutRidgeRoadOfficePropertyMember" xlink:label="cli_NintyFiveChestnutRidgeRoadOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_NintyFiveChestnutRidgeRoadOfficePropertyMember" xlink:to="cli_NintyFiveChestnutRidgeRoadOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_NintyFiveChestnutRidgeRoadOfficePropertyMember_lbl" xml:lang="en-US">Ninty Five Chestnut Ridge Road  Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_NintyFiveChestnutRidgeRoadOfficePropertyMember_lbl" xml:lang="en-US">Ninty Five Chestnut Ridge Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_NintyFiveChestnutRidgeRoadOfficePropertyMember_lbl" xml:lang="en-US">95 Chestnut Ridge Road [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneThirtyFiveChestnutRidgeRoadOfficePropertyMember" xlink:label="cli_OneThirtyFiveChestnutRidgeRoadOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneThirtyFiveChestnutRidgeRoadOfficePropertyMember" xlink:to="cli_OneThirtyFiveChestnutRidgeRoadOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneThirtyFiveChestnutRidgeRoadOfficePropertyMember_lbl" xml:lang="en-US">One Thirty Five Chestnut Ridge Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneThirtyFiveChestnutRidgeRoadOfficePropertyMember_lbl" xml:lang="en-US">One Thirty Five Chestnut Ridge Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneThirtyFiveChestnutRidgeRoadOfficePropertyMember_lbl" xml:lang="en-US">135 Chestnut Ridge Road [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FifteenEastMidlandAvenueOfficePropertyMember" xlink:label="cli_FifteenEastMidlandAvenueOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FifteenEastMidlandAvenueOfficePropertyMember" xlink:to="cli_FifteenEastMidlandAvenueOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FifteenEastMidlandAvenueOfficePropertyMember_lbl" xml:lang="en-US">Fifteen East Midland Avenue Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FifteenEastMidlandAvenueOfficePropertyMember_lbl" xml:lang="en-US">Fifteen East Midland Avenue Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FifteenEastMidlandAvenueOfficePropertyMember_lbl" xml:lang="en-US">15 East Midland Avenue [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneFortyEastRidgewoodAvenueOfficePropertyMember" xlink:label="cli_OneFortyEastRidgewoodAvenueOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneFortyEastRidgewoodAvenueOfficePropertyMember" xlink:to="cli_OneFortyEastRidgewoodAvenueOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneFortyEastRidgewoodAvenueOfficePropertyMember_lbl" xml:lang="en-US">One Forty East Ridgewood Avenue Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneFortyEastRidgewoodAvenueOfficePropertyMember_lbl" xml:lang="en-US">One Forty East Ridgewood Avenue Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneFortyEastRidgewoodAvenueOfficePropertyMember_lbl" xml:lang="en-US">140 East Ridgewood Avenue [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FourHundredSixtyOneFromRoadOfficePropertyMember" xlink:label="cli_FourHundredSixtyOneFromRoadOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FourHundredSixtyOneFromRoadOfficePropertyMember" xlink:to="cli_FourHundredSixtyOneFromRoadOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FourHundredSixtyOneFromRoadOfficePropertyMember_lbl" xml:lang="en-US">Four Hundred Sixty One From Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FourHundredSixtyOneFromRoadOfficePropertyMember_lbl" xml:lang="en-US">Four Hundred Sixty One From Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FourHundredSixtyOneFromRoadOfficePropertyMember_lbl" xml:lang="en-US">461 From Road [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_SixHundredFiftyFromRoadOfficePropertyMember" xlink:label="cli_SixHundredFiftyFromRoadOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_SixHundredFiftyFromRoadOfficePropertyMember" xlink:to="cli_SixHundredFiftyFromRoadOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_SixHundredFiftyFromRoadOfficePropertyMember_lbl" xml:lang="en-US">Six Hundred Fifty From Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_SixHundredFiftyFromRoadOfficePropertyMember_lbl" xml:lang="en-US">Six Hundred Fifty From Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_SixHundredFiftyFromRoadOfficePropertyMember_lbl" xml:lang="en-US">650 From Road [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_SixtyOneSouthParamusRoadOfficePropertyMember" xlink:label="cli_SixtyOneSouthParamusRoadOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_SixtyOneSouthParamusRoadOfficePropertyMember" xlink:to="cli_SixtyOneSouthParamusRoadOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_SixtyOneSouthParamusRoadOfficePropertyMember_lbl" xml:lang="en-US">Sixty One South Paramus Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_SixtyOneSouthParamusRoadOfficePropertyMember_lbl" xml:lang="en-US">Sixty One South Paramus Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_SixtyOneSouthParamusRoadOfficePropertyMember_lbl" xml:lang="en-US">61 South Paramus Road [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneHundredTwentyWestPassaicStreetOfficePropertyMember" xlink:label="cli_OneHundredTwentyWestPassaicStreetOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneHundredTwentyWestPassaicStreetOfficePropertyMember" xlink:to="cli_OneHundredTwentyWestPassaicStreetOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneHundredTwentyWestPassaicStreetOfficePropertyMember_lbl" xml:lang="en-US">One Hundred Twenty West Passaic Street Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneHundredTwentyWestPassaicStreetOfficePropertyMember_lbl" xml:lang="en-US">One Hundred Twenty West Passaic Street Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneHundredTwentyWestPassaicStreetOfficePropertyMember_lbl" xml:lang="en-US">120 West Passaic Street [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ThreeHundredSixtyFiveWestPassaicStreetOfficePropertyMember" xlink:label="cli_ThreeHundredSixtyFiveWestPassaicStreetOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ThreeHundredSixtyFiveWestPassaicStreetOfficePropertyMember" xlink:to="cli_ThreeHundredSixtyFiveWestPassaicStreetOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ThreeHundredSixtyFiveWestPassaicStreetOfficePropertyMember_lbl" xml:lang="en-US">Three Hundred Sixty Five West Passaic Street Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ThreeHundredSixtyFiveWestPassaicStreetOfficePropertyMember_lbl" xml:lang="en-US">Three Hundred Sixty Five West Passaic Street Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ThreeHundredSixtyFiveWestPassaicStreetOfficePropertyMember_lbl" xml:lang="en-US">365 West Passaic Street [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ThreeHundredNinetyFiveWestPassaicStreetOfficePropertyMember" xlink:label="cli_ThreeHundredNinetyFiveWestPassaicStreetOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ThreeHundredNinetyFiveWestPassaicStreetOfficePropertyMember" xlink:to="cli_ThreeHundredNinetyFiveWestPassaicStreetOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ThreeHundredNinetyFiveWestPassaicStreetOfficePropertyMember_lbl" xml:lang="en-US">Three Hundred Ninety Five West Passaic Street Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ThreeHundredNinetyFiveWestPassaicStreetOfficePropertyMember_lbl" xml:lang="en-US">Three Hundred Ninety Five West Passaic Street Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ThreeHundredNinetyFiveWestPassaicStreetOfficePropertyMember_lbl" xml:lang="en-US">395 West Passaic Street [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneLakeStreetOfficePropertyMember" xlink:label="cli_OneLakeStreetOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneLakeStreetOfficePropertyMember" xlink:to="cli_OneLakeStreetOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneLakeStreetOfficePropertyMember_lbl" xml:lang="en-US">One Lake Street Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneLakeStreetOfficePropertyMember_lbl" xml:lang="en-US">One Lake Street Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneLakeStreetOfficePropertyMember_lbl" xml:lang="en-US">1 Lake Street [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TenMountainviewRoadOfficePropertyMember" xlink:label="cli_TenMountainviewRoadOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TenMountainviewRoadOfficePropertyMember" xlink:to="cli_TenMountainviewRoadOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TenMountainviewRoadOfficePropertyMember_lbl" xml:lang="en-US">Ten Mountainview Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TenMountainviewRoadOfficePropertyMember_lbl" xml:lang="en-US">Ten Mountainview Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TenMountainviewRoadOfficePropertyMember_lbl" xml:lang="en-US">10 Mountainview Road [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FourHundredChestnutRidgeRoadOfficePropertyMember" xlink:label="cli_FourHundredChestnutRidgeRoadOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FourHundredChestnutRidgeRoadOfficePropertyMember" xlink:to="cli_FourHundredChestnutRidgeRoadOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FourHundredChestnutRidgeRoadOfficePropertyMember_lbl" xml:lang="en-US">Four Hundred Chestnut Ridge Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FourHundredChestnutRidgeRoadOfficePropertyMember_lbl" xml:lang="en-US">Four Hundred Chestnut Ridge Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FourHundredChestnutRidgeRoadOfficePropertyMember_lbl" xml:lang="en-US">400 Chestnut Ridge Road [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FourHundredSeventyChestnutRidgeRoadOfficePropertyMember" xlink:label="cli_FourHundredSeventyChestnutRidgeRoadOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FourHundredSeventyChestnutRidgeRoadOfficePropertyMember" xlink:to="cli_FourHundredSeventyChestnutRidgeRoadOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FourHundredSeventyChestnutRidgeRoadOfficePropertyMember_lbl" xml:lang="en-US">Four Hundred Seventy Chestnut Ridge Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FourHundredSeventyChestnutRidgeRoadOfficePropertyMember_lbl" xml:lang="en-US">Four Hundred Seventy Chestnut Ridge Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FourHundredSeventyChestnutRidgeRoadOfficePropertyMember_lbl" xml:lang="en-US">470 Chestnut Ridge Road [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FiveHundredThirtyChestnutRidgeRoadOfficePropertyMember" xlink:label="cli_FiveHundredThirtyChestnutRidgeRoadOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FiveHundredThirtyChestnutRidgeRoadOfficePropertyMember" xlink:to="cli_FiveHundredThirtyChestnutRidgeRoadOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FiveHundredThirtyChestnutRidgeRoadOfficePropertyMember_lbl" xml:lang="en-US">Five Hundred Thirty Chestnut Ridge Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FiveHundredThirtyChestnutRidgeRoadOfficePropertyMember_lbl" xml:lang="en-US">Five Hundred Thirty Chestnut Ridge Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FiveHundredThirtyChestnutRidgeRoadOfficePropertyMember_lbl" xml:lang="en-US">530 Chestnut Ridge Road [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FiftyTiceBoulevardOfficePropertyMember" xlink:label="cli_FiftyTiceBoulevardOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FiftyTiceBoulevardOfficePropertyMember" xlink:to="cli_FiftyTiceBoulevardOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FiftyTiceBoulevardOfficePropertyMember_lbl" xml:lang="en-US">Fifty Tice Boulevard Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FiftyTiceBoulevardOfficePropertyMember_lbl" xml:lang="en-US">Fifty Tice Boulevard Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FiftyTiceBoulevardOfficePropertyMember_lbl" xml:lang="en-US">50 Tice Boulevard [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ThreeHundredTiceBoulevardOfficePropertyMember" xlink:label="cli_ThreeHundredTiceBoulevardOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ThreeHundredTiceBoulevardOfficePropertyMember" xlink:to="cli_ThreeHundredTiceBoulevardOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ThreeHundredTiceBoulevardOfficePropertyMember_lbl" xml:lang="en-US">Three Hundred Tice Boulevard Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ThreeHundredTiceBoulevardOfficePropertyMember_lbl" xml:lang="en-US">Three Hundred Tice Boulevard Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ThreeHundredTiceBoulevardOfficePropertyMember_lbl" xml:lang="en-US">300 Tice Boulevard [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ThreeTerriLaneOfficeOrFlexPropertyMember" xlink:label="cli_ThreeTerriLaneOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ThreeTerriLaneOfficeOrFlexPropertyMember" xlink:to="cli_ThreeTerriLaneOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ThreeTerriLaneOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Three Terri Lane Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ThreeTerriLaneOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Three Terri Lane Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ThreeTerriLaneOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">3 Terri Lane [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FiveTerriLaneOfficeOrFlexPropertyMember" xlink:label="cli_FiveTerriLaneOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FiveTerriLaneOfficeOrFlexPropertyMember" xlink:to="cli_FiveTerriLaneOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FiveTerriLaneOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Five Terri Lane Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FiveTerriLaneOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Five Terri Lane Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FiveTerriLaneOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">5 Terri Lane [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwoCommerceDriveOfficeOrFlexPropertyMember" xlink:label="cli_TwoCommerceDriveOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwoCommerceDriveOfficeOrFlexPropertyMember" xlink:to="cli_TwoCommerceDriveOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwoCommerceDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Two Commerce Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwoCommerceDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Two Commerce Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwoCommerceDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">2 Commerce Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneHundredOneCommerceDriveOfficeOrFlexPropertyMember" xlink:label="cli_OneHundredOneCommerceDriveOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneHundredOneCommerceDriveOfficeOrFlexPropertyMember" xlink:to="cli_OneHundredOneCommerceDriveOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneHundredOneCommerceDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Hundred One Commerce Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneHundredOneCommerceDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Hundred One Commerce Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneHundredOneCommerceDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">101 Commerce Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneHundredTwoCommerceDriveOfficeOrFlexPropertyMember" xlink:label="cli_OneHundredTwoCommerceDriveOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneHundredTwoCommerceDriveOfficeOrFlexPropertyMember" xlink:to="cli_OneHundredTwoCommerceDriveOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneHundredTwoCommerceDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Hundred Two Commerce Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneHundredTwoCommerceDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Hundred Two Commerce Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneHundredTwoCommerceDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">102 Commerce Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwoHundredOneCommerceDriveOfficeOrFlexPropertyMember" xlink:label="cli_TwoHundredOneCommerceDriveOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwoHundredOneCommerceDriveOfficeOrFlexPropertyMember" xlink:to="cli_TwoHundredOneCommerceDriveOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwoHundredOneCommerceDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Two Hundred One Commerce Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwoHundredOneCommerceDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Two Hundred One Commerce Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwoHundredOneCommerceDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">201 Commerce Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwoHundredTwoCommerceDriveOfficeOrFlexPropertyMember" xlink:label="cli_TwoHundredTwoCommerceDriveOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwoHundredTwoCommerceDriveOfficeOrFlexPropertyMember" xlink:to="cli_TwoHundredTwoCommerceDriveOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwoHundredTwoCommerceDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Two Hundred Two Commerce Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwoHundredTwoCommerceDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Two Hundred Two Commerce Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwoHundredTwoCommerceDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">202 Commerce Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneExecutiveDriveOfficeOrFlexPropertyMember" xlink:label="cli_OneExecutiveDriveOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneExecutiveDriveOfficeOrFlexPropertyMember" xlink:to="cli_OneExecutiveDriveOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneExecutiveDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Executive Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneExecutiveDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Executive Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneExecutiveDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">1 Executive Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwoExecutiveDriveOfficeOrFlexPropertyMember" xlink:label="cli_TwoExecutiveDriveOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwoExecutiveDriveOfficeOrFlexPropertyMember" xlink:to="cli_TwoExecutiveDriveOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwoExecutiveDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Two Executive Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwoExecutiveDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Two Executive Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwoExecutiveDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">2 Executive Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneHundredOneExecutiveDriveOfficeOrFlexPropertyMember" xlink:label="cli_OneHundredOneExecutiveDriveOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneHundredOneExecutiveDriveOfficeOrFlexPropertyMember" xlink:to="cli_OneHundredOneExecutiveDriveOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneHundredOneExecutiveDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Hundred One Executive Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneHundredOneExecutiveDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Hundred One Executive Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneHundredOneExecutiveDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">101 Executive Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneHundredTwoExecutiveDriveOfficeOrFlexPropertyMember" xlink:label="cli_OneHundredTwoExecutiveDriveOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneHundredTwoExecutiveDriveOfficeOrFlexPropertyMember" xlink:to="cli_OneHundredTwoExecutiveDriveOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneHundredTwoExecutiveDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Hundred Two Executive Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneHundredTwoExecutiveDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Hundred Two Executive Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneHundredTwoExecutiveDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">102 Executive Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwoHundredTwentyFiveExecutiveDriveOfficeOrFlexPropertyMember" xlink:label="cli_TwoHundredTwentyFiveExecutiveDriveOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwoHundredTwentyFiveExecutiveDriveOfficeOrFlexPropertyMember" xlink:to="cli_TwoHundredTwentyFiveExecutiveDriveOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwoHundredTwentyFiveExecutiveDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Two Hundred Twenty Five Executive Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwoHundredTwentyFiveExecutiveDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Two Hundred Twenty Five Executive Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwoHundredTwentyFiveExecutiveDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">225 Executive Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_NintySevenFosterRoadOfficeOrFlexPropertyMember" xlink:label="cli_NintySevenFosterRoadOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_NintySevenFosterRoadOfficeOrFlexPropertyMember" xlink:to="cli_NintySevenFosterRoadOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_NintySevenFosterRoadOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Ninty Seven Foster Road Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_NintySevenFosterRoadOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Ninty Seven Foster Road Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_NintySevenFosterRoadOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">97 Foster Road [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneThousandFiveHundredSevenLancerDriveOfficeOrFlexPropertyMember" xlink:label="cli_OneThousandFiveHundredSevenLancerDriveOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneThousandFiveHundredSevenLancerDriveOfficeOrFlexPropertyMember" xlink:to="cli_OneThousandFiveHundredSevenLancerDriveOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneThousandFiveHundredSevenLancerDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Thousand Five Hundred Seven Lancer Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneThousandFiveHundredSevenLancerDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Thousand Five Hundred Seven Lancer Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneThousandFiveHundredSevenLancerDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">1507 Lancer Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneThousandTwoHundredFortyFiveNorthChurchStreetOfficeOrFlexPropertyMember" xlink:label="cli_OneThousandTwoHundredFortyFiveNorthChurchStreetOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneThousandTwoHundredFortyFiveNorthChurchStreetOfficeOrFlexPropertyMember" xlink:to="cli_OneThousandTwoHundredFortyFiveNorthChurchStreetOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneThousandTwoHundredFortyFiveNorthChurchStreetOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Thousand Two Hundred Forty Five North Church Street Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneThousandTwoHundredFortyFiveNorthChurchStreetOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Thousand Two Hundred Forty Five North Church Street Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneThousandTwoHundredFortyFiveNorthChurchStreetOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">1245 North Church Street [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneThousandTwoFortySevenNorthChurchStreetOfficeOrFlexPropertyMember" xlink:label="cli_OneThousandTwoFortySevenNorthChurchStreetOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneThousandTwoFortySevenNorthChurchStreetOfficeOrFlexPropertyMember" xlink:to="cli_OneThousandTwoFortySevenNorthChurchStreetOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneThousandTwoFortySevenNorthChurchStreetOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Thousand Two Forty Seven North Church Street Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneThousandTwoFortySevenNorthChurchStreetOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Thousand Two Forty Seven North Church Street Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneThousandTwoFortySevenNorthChurchStreetOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">1247 North Church Street [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneThousandTwoFiftySixNorthChurchStreetOfficeOrFlexPropertyMember" xlink:label="cli_OneThousandTwoFiftySixNorthChurchStreetOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneThousandTwoFiftySixNorthChurchStreetOfficeOrFlexPropertyMember" xlink:to="cli_OneThousandTwoFiftySixNorthChurchStreetOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneThousandTwoFiftySixNorthChurchStreetOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Thousand Two Fifty Six North Church Street Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneThousandTwoFiftySixNorthChurchStreetOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Thousand Two Fifty Six North Church Street Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneThousandTwoFiftySixNorthChurchStreetOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">1256 North Church Street [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_EightHundredFortyNorthLenolaRoadOfficeOrFlexPropertyMember" xlink:label="cli_EightHundredFortyNorthLenolaRoadOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_EightHundredFortyNorthLenolaRoadOfficeOrFlexPropertyMember" xlink:to="cli_EightHundredFortyNorthLenolaRoadOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_EightHundredFortyNorthLenolaRoadOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Eight Hundred Forty North Lenola Road Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_EightHundredFortyNorthLenolaRoadOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Eight Hundred Forty North Lenola Road Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_EightHundredFortyNorthLenolaRoadOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">840 North Lenola Road [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_EightHundredFortyFourNorthLenolaRoadOfficeOrFlexPropertyMember" xlink:label="cli_EightHundredFortyFourNorthLenolaRoadOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_EightHundredFortyFourNorthLenolaRoadOfficeOrFlexPropertyMember" xlink:to="cli_EightHundredFortyFourNorthLenolaRoadOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_EightHundredFortyFourNorthLenolaRoadOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Eight Hundred Forty Four North Lenola Road Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_EightHundredFortyFourNorthLenolaRoadOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Eight Hundred Forty Four North Lenola Road Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_EightHundredFortyFourNorthLenolaRoadOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">844 North Lenola Road [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_NineHundredFifteenNorthLenolaRoadOfficeOrFlexPropertyMember" xlink:label="cli_NineHundredFifteenNorthLenolaRoadOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_NineHundredFifteenNorthLenolaRoadOfficeOrFlexPropertyMember" xlink:to="cli_NineHundredFifteenNorthLenolaRoadOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_NineHundredFifteenNorthLenolaRoadOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Nine Hundred Fifteen North Lenola Road Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_NineHundredFifteenNorthLenolaRoadOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Nine Hundred Fifteen North Lenola Road Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_NineHundredFifteenNorthLenolaRoadOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">915 North Lenola Road [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwoHundredTwentyFourStrawbridgeDriveOfficePropertyMember" xlink:label="cli_TwoHundredTwentyFourStrawbridgeDriveOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwoHundredTwentyFourStrawbridgeDriveOfficePropertyMember" xlink:to="cli_TwoHundredTwentyFourStrawbridgeDriveOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwoHundredTwentyFourStrawbridgeDriveOfficePropertyMember_lbl" xml:lang="en-US">Two Hundred Twenty Four Strawbridge Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwoHundredTwentyFourStrawbridgeDriveOfficePropertyMember_lbl" xml:lang="en-US">Two Hundred Twenty Four Strawbridge Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwoHundredTwentyFourStrawbridgeDriveOfficePropertyMember_lbl" xml:lang="en-US">224 Strawbridge Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwoHundredTwentyEightStrawbridgeDriveOfficePropertyMember" xlink:label="cli_TwoHundredTwentyEightStrawbridgeDriveOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwoHundredTwentyEightStrawbridgeDriveOfficePropertyMember" xlink:to="cli_TwoHundredTwentyEightStrawbridgeDriveOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwoHundredTwentyEightStrawbridgeDriveOfficePropertyMember_lbl" xml:lang="en-US">Two Hundred Twenty Eight Strawbridge Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwoHundredTwentyEightStrawbridgeDriveOfficePropertyMember_lbl" xml:lang="en-US">Two Hundred Twenty Eight Strawbridge Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwoHundredTwentyEightStrawbridgeDriveOfficePropertyMember_lbl" xml:lang="en-US">228 Strawbridge Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwoHundredThirtyTwoStrawbridgeDriveOfficePropertyMember" xlink:label="cli_TwoHundredThirtyTwoStrawbridgeDriveOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwoHundredThirtyTwoStrawbridgeDriveOfficePropertyMember" xlink:to="cli_TwoHundredThirtyTwoStrawbridgeDriveOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwoHundredThirtyTwoStrawbridgeDriveOfficePropertyMember_lbl" xml:lang="en-US">Two Hundred Thirty Two Strawbridge Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwoHundredThirtyTwoStrawbridgeDriveOfficePropertyMember_lbl" xml:lang="en-US">Two Hundred Thirty Two Strawbridge Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwoHundredThirtyTwoStrawbridgeDriveOfficePropertyMember_lbl" xml:lang="en-US">232 Strawbridge Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwoTwosomeDriveOfficeOrFlexPropertyMember" xlink:label="cli_TwoTwosomeDriveOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwoTwosomeDriveOfficeOrFlexPropertyMember" xlink:to="cli_TwoTwosomeDriveOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwoTwosomeDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Two Twosome Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwoTwosomeDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Two Twosome Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwoTwosomeDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">2 Twosome Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ThirtyTwosomeDriveOfficeOrFlexPropertyMember" xlink:label="cli_ThirtyTwosomeDriveOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ThirtyTwosomeDriveOfficeOrFlexPropertyMember" xlink:to="cli_ThirtyTwosomeDriveOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ThirtyTwosomeDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Thirty Twosome Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ThirtyTwosomeDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Thirty Twosome Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ThirtyTwosomeDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">30 Twosome Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ThirtyOneTwosomeDriveOfficeOrFlexPropertyMember" xlink:label="cli_ThirtyOneTwosomeDriveOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ThirtyOneTwosomeDriveOfficeOrFlexPropertyMember" xlink:to="cli_ThirtyOneTwosomeDriveOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ThirtyOneTwosomeDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Thirty One Twosome Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ThirtyOneTwosomeDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Thirty One Twosome Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ThirtyOneTwosomeDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">31 Twosome Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FortyTwosomeDriveOfficeOrFlexPropertyMember" xlink:label="cli_FortyTwosomeDriveOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FortyTwosomeDriveOfficeOrFlexPropertyMember" xlink:to="cli_FortyTwosomeDriveOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FortyTwosomeDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Forty Twosome Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FortyTwosomeDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Forty Twosome Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FortyTwosomeDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">40 Twosome Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FortyOneTwosomeDriveOfficeOrFlexPropertyMember" xlink:label="cli_FortyOneTwosomeDriveOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FortyOneTwosomeDriveOfficeOrFlexPropertyMember" xlink:to="cli_FortyOneTwosomeDriveOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FortyOneTwosomeDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Forty One Twosome Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FortyOneTwosomeDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Forty One Twosome Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FortyOneTwosomeDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">41 Twosome Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FiftyTwosomeDriveOfficeOrFlexPropertyMember" xlink:label="cli_FiftyTwosomeDriveOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FiftyTwosomeDriveOfficeOrFlexPropertyMember" xlink:to="cli_FiftyTwosomeDriveOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FiftyTwosomeDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Fifty Twosome Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FiftyTwosomeDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Fifty Twosome Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FiftyTwosomeDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">50 Twosome Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneThousandFourHundredFiftyOneMetropolitanDriveMember" xlink:label="cli_OneThousandFourHundredFiftyOneMetropolitanDriveMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneThousandFourHundredFiftyOneMetropolitanDriveMember" xlink:to="cli_OneThousandFourHundredFiftyOneMetropolitanDriveMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneThousandFourHundredFiftyOneMetropolitanDriveMember_lbl" xml:lang="en-US">One Thousand Four Hundred Fifty One Metropolitan Drive [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneThousandFourHundredFiftyOneMetropolitanDriveMember_lbl" xml:lang="en-US">One Thousand Four Hundred Fifty One Metropolitan Drive [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneThousandFourHundredFiftyOneMetropolitanDriveMember_lbl" xml:lang="en-US">1451 Metropolitan Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneHudredFiftyJfKennedyParkwayMember" xlink:label="cli_OneHudredFiftyJfKennedyParkwayMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneHudredFiftyJfKennedyParkwayMember" xlink:to="cli_OneHudredFiftyJfKennedyParkwayMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneHudredFiftyJfKennedyParkwayMember_lbl" xml:lang="en-US">One Hudred Fifty Jf Kennedy Parkway [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneHudredFiftyJfKennedyParkwayMember_lbl" xml:lang="en-US">One Hudred Fifty Jf Kennedy Parkway [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneHudredFiftyJfKennedyParkwayMember_lbl" xml:lang="en-US">150 J.F. Kennedy Parkway [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FourBeckerFarmRoadOfficePropertyMember" xlink:label="cli_FourBeckerFarmRoadOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FourBeckerFarmRoadOfficePropertyMember" xlink:to="cli_FourBeckerFarmRoadOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FourBeckerFarmRoadOfficePropertyMember_lbl" xml:lang="en-US">Four Becker Farm Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FourBeckerFarmRoadOfficePropertyMember_lbl" xml:lang="en-US">Four Becker Farm Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FourBeckerFarmRoadOfficePropertyMember_lbl" xml:lang="en-US">4 Becker Farm Road [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FiveBeckerFarmRoadOfficePropertyMember" xlink:label="cli_FiveBeckerFarmRoadOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FiveBeckerFarmRoadOfficePropertyMember" xlink:to="cli_FiveBeckerFarmRoadOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FiveBeckerFarmRoadOfficePropertyMember_lbl" xml:lang="en-US">Five Becker Farm Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FiveBeckerFarmRoadOfficePropertyMember_lbl" xml:lang="en-US">Five Becker Farm Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FiveBeckerFarmRoadOfficePropertyMember_lbl" xml:lang="en-US">5 Becker Farm Road [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_SixBeckerFarmRoadOfficePropertyMember" xlink:label="cli_SixBeckerFarmRoadOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_SixBeckerFarmRoadOfficePropertyMember" xlink:to="cli_SixBeckerFarmRoadOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_SixBeckerFarmRoadOfficePropertyMember_lbl" xml:lang="en-US">Six Becker Farm Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_SixBeckerFarmRoadOfficePropertyMember_lbl" xml:lang="en-US">Six Becker Farm Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_SixBeckerFarmRoadOfficePropertyMember_lbl" xml:lang="en-US">6 Becker Farm Road [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneHundredOneEisenhowerParkwayMember" xlink:label="cli_OneHundredOneEisenhowerParkwayMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneHundredOneEisenhowerParkwayMember" xlink:to="cli_OneHundredOneEisenhowerParkwayMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneHundredOneEisenhowerParkwayMember_lbl" xml:lang="en-US">One Hundred One Eisenhower Parkway [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneHundredOneEisenhowerParkwayMember_lbl" xml:lang="en-US">One Hundred One Eisenhower Parkway [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneHundredOneEisenhowerParkwayMember_lbl" xml:lang="en-US">101 Eisenhower Parkway [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneHundredThreeEisenhowerParkwayMember" xlink:label="cli_OneHundredThreeEisenhowerParkwayMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneHundredThreeEisenhowerParkwayMember" xlink:to="cli_OneHundredThreeEisenhowerParkwayMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneHundredThreeEisenhowerParkwayMember_lbl" xml:lang="en-US">One Hundred Three Eisenhower Parkway [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneHundredThreeEisenhowerParkwayMember_lbl" xml:lang="en-US">One Hundred Three Eisenhower Parkway [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneHundredThreeEisenhowerParkwayMember_lbl" xml:lang="en-US">103 Eisenhower Parkway [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneHundredFiveEisenhowerParkwayMember" xlink:label="cli_OneHundredFiveEisenhowerParkwayMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneHundredFiveEisenhowerParkwayMember" xlink:to="cli_OneHundredFiveEisenhowerParkwayMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneHundredFiveEisenhowerParkwayMember_lbl" xml:lang="en-US">One Hundred Five Eisenhower Parkway [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneHundredFiveEisenhowerParkwayMember_lbl" xml:lang="en-US">One Hundred Five Eisenhower Parkway [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneHundredFiveEisenhowerParkwayMember_lbl" xml:lang="en-US">105 Eisenhower Parkway [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_SeventyFiveLivingstonAvenueOfficePropertyMember" xlink:label="cli_SeventyFiveLivingstonAvenueOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_SeventyFiveLivingstonAvenueOfficePropertyMember" xlink:to="cli_SeventyFiveLivingstonAvenueOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_SeventyFiveLivingstonAvenueOfficePropertyMember_lbl" xml:lang="en-US">Seventy Five Livingston Avenue Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_SeventyFiveLivingstonAvenueOfficePropertyMember_lbl" xml:lang="en-US">Seventy Five Livingston Avenue Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_SeventyFiveLivingstonAvenueOfficePropertyMember_lbl" xml:lang="en-US">75 Livingston Avenue [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_EightyFiveLivingstonAvenueOfficePropertyMember" xlink:label="cli_EightyFiveLivingstonAvenueOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_EightyFiveLivingstonAvenueOfficePropertyMember" xlink:to="cli_EightyFiveLivingstonAvenueOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_EightyFiveLivingstonAvenueOfficePropertyMember_lbl" xml:lang="en-US">Eighty Five Livingston Avenue Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_EightyFiveLivingstonAvenueOfficePropertyMember_lbl" xml:lang="en-US">Eighty Five Livingston Avenue Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_EightyFiveLivingstonAvenueOfficePropertyMember_lbl" xml:lang="en-US">85 Livingston Avenue [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_HarborsideFinancialCenterPlazaOneOfficePropertyMember" xlink:label="cli_HarborsideFinancialCenterPlazaOneOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_HarborsideFinancialCenterPlazaOneOfficePropertyMember" xlink:to="cli_HarborsideFinancialCenterPlazaOneOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_HarborsideFinancialCenterPlazaOneOfficePropertyMember_lbl" xml:lang="en-US">Harborside Financial Center Plaza One Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_HarborsideFinancialCenterPlazaOneOfficePropertyMember_lbl" xml:lang="en-US">Harborside Financial Center Plaza One Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_HarborsideFinancialCenterPlazaOneOfficePropertyMember_lbl" xml:lang="en-US">Harborside Financial Center Plaza 1 [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_HarborsideFinancialCenterPlazaTwoOfficePropertyMember" xlink:label="cli_HarborsideFinancialCenterPlazaTwoOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_HarborsideFinancialCenterPlazaTwoOfficePropertyMember" xlink:to="cli_HarborsideFinancialCenterPlazaTwoOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_HarborsideFinancialCenterPlazaTwoOfficePropertyMember_lbl" xml:lang="en-US">Harborside Financial Center Plaza Two Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_HarborsideFinancialCenterPlazaTwoOfficePropertyMember_lbl" xml:lang="en-US">Harborside Financial Center Plaza Two Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_HarborsideFinancialCenterPlazaTwoOfficePropertyMember_lbl" xml:lang="en-US">Harborside Financial Center Plaza 2 [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_HarborsideFinancialCenterPlazaThreeOfficePropertyMember" xlink:label="cli_HarborsideFinancialCenterPlazaThreeOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_HarborsideFinancialCenterPlazaThreeOfficePropertyMember" xlink:to="cli_HarborsideFinancialCenterPlazaThreeOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_HarborsideFinancialCenterPlazaThreeOfficePropertyMember_lbl" xml:lang="en-US">Harborside Financial Center Plaza Three Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_HarborsideFinancialCenterPlazaThreeOfficePropertyMember_lbl" xml:lang="en-US">Harborside Financial Center Plaza Three Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_HarborsideFinancialCenterPlazaThreeOfficePropertyMember_lbl" xml:lang="en-US">Harborside Financial Center Plaza 3 [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_HarborsideFinancialCenterPlazaFourOfficePropertyMember" xlink:label="cli_HarborsideFinancialCenterPlazaFourOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_HarborsideFinancialCenterPlazaFourOfficePropertyMember" xlink:to="cli_HarborsideFinancialCenterPlazaFourOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_HarborsideFinancialCenterPlazaFourOfficePropertyMember_lbl" xml:lang="en-US">Harborside Financial Center Plaza Four Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_HarborsideFinancialCenterPlazaFourOfficePropertyMember_lbl" xml:lang="en-US">Harborside Financial Center Plaza Four Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_HarborsideFinancialCenterPlazaFourOfficePropertyMember_lbl" xml:lang="en-US">Harborside Financial Center Plaza 4 [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_HarborsideFinancialCenterPlazaFiveOfficePropertyMember" xlink:label="cli_HarborsideFinancialCenterPlazaFiveOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_HarborsideFinancialCenterPlazaFiveOfficePropertyMember" xlink:to="cli_HarborsideFinancialCenterPlazaFiveOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_HarborsideFinancialCenterPlazaFiveOfficePropertyMember_lbl" xml:lang="en-US">Harborside Financial Center Plaza Five Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_HarborsideFinancialCenterPlazaFiveOfficePropertyMember_lbl" xml:lang="en-US">Harborside Financial Center Plaza Five Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_HarborsideFinancialCenterPlazaFiveOfficePropertyMember_lbl" xml:lang="en-US">Harborside Financial Center Plaza 5 [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneHundredOneHudsonStreetOfficePropertyMember" xlink:label="cli_OneHundredOneHudsonStreetOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneHundredOneHudsonStreetOfficePropertyMember" xlink:to="cli_OneHundredOneHudsonStreetOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneHundredOneHudsonStreetOfficePropertyMember_lbl" xml:lang="en-US">One Hundred One Hudson Street Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneHundredOneHudsonStreetOfficePropertyMember_lbl" xml:lang="en-US">One Hundred One Hudson Street Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneHundredOneHudsonStreetOfficePropertyMember_lbl" xml:lang="en-US">101 Hudson Street [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ThreeDriveOfficePropertyMember" xlink:label="cli_ThreeDriveOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ThreeDriveOfficePropertyMember" xlink:to="cli_ThreeDriveOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ThreeDriveOfficePropertyMember_lbl" xml:lang="en-US">Three A A A  Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ThreeDriveOfficePropertyMember_lbl" xml:lang="en-US">Three Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ThreeDriveOfficePropertyMember_lbl" xml:lang="en-US">3 AAA Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneHundredHorizonCenterBoulevardOfficeOrFlexPropertyMember" xlink:label="cli_OneHundredHorizonCenterBoulevardOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneHundredHorizonCenterBoulevardOfficeOrFlexPropertyMember" xlink:to="cli_OneHundredHorizonCenterBoulevardOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneHundredHorizonCenterBoulevardOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Hundred Horizon Center Boulevard Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneHundredHorizonCenterBoulevardOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Hundred Horizon Center Boulevard Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneHundredHorizonCenterBoulevardOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">100 Horizon Center Boulevard [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwoHundredHorizonCenterOfficeOrFlexPropertyMember" xlink:label="cli_TwoHundredHorizonCenterOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwoHundredHorizonCenterOfficeOrFlexPropertyMember" xlink:to="cli_TwoHundredHorizonCenterOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwoHundredHorizonCenterOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Two Hundred Horizon Center Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwoHundredHorizonCenterOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Two Hundred Horizon Center Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwoHundredHorizonCenterOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">200 Horizon Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ThreeHundredHorizonCenterOfficeOrFlexPropertyMember" xlink:label="cli_ThreeHundredHorizonCenterOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ThreeHundredHorizonCenterOfficeOrFlexPropertyMember" xlink:to="cli_ThreeHundredHorizonCenterOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ThreeHundredHorizonCenterOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Three Hundred Horizon Center Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ThreeHundredHorizonCenterOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Three Hundred Horizon Center Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ThreeHundredHorizonCenterOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">300 Horizon Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FiveHundredHorizonCenterOfficeOrFlexPropertyMember" xlink:label="cli_FiveHundredHorizonCenterOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FiveHundredHorizonCenterOfficeOrFlexPropertyMember" xlink:to="cli_FiveHundredHorizonCenterOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FiveHundredHorizonCenterOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Five Hundred Horizon Center Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FiveHundredHorizonCenterOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Five Hundred Horizon Center Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FiveHundredHorizonCenterOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">500 Horizon Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_SixHundredHorizonCenterOfficeOrFlexPropertyMember" xlink:label="cli_SixHundredHorizonCenterOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_SixHundredHorizonCenterOfficeOrFlexPropertyMember" xlink:to="cli_SixHundredHorizonCenterOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_SixHundredHorizonCenterOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Six Hundred Horizon Center Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_SixHundredHorizonCenterOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Six Hundred Horizon Center Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_SixHundredHorizonCenterOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">600 Horizon Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_SevenHundredHorizonCenterOfficePropertyMember" xlink:label="cli_SevenHundredHorizonCenterOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_SevenHundredHorizonCenterOfficePropertyMember" xlink:to="cli_SevenHundredHorizonCenterOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_SevenHundredHorizonCenterOfficePropertyMember_lbl" xml:lang="en-US">Seven Hundred Horizon Center Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_SevenHundredHorizonCenterOfficePropertyMember_lbl" xml:lang="en-US">Seven Hundred Horizon Center Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_SevenHundredHorizonCenterOfficePropertyMember_lbl" xml:lang="en-US">700 Horizon Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwoSouthGoldDriveOfficePropertyMember" xlink:label="cli_TwoSouthGoldDriveOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwoSouthGoldDriveOfficePropertyMember" xlink:to="cli_TwoSouthGoldDriveOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwoSouthGoldDriveOfficePropertyMember_lbl" xml:lang="en-US">Two South Gold Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwoSouthGoldDriveOfficePropertyMember_lbl" xml:lang="en-US">Two South Gold Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwoSouthGoldDriveOfficePropertyMember_lbl" xml:lang="en-US">2 South Gold Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneHundredThreeCarnegieCenterOfficePropertyMember" xlink:label="cli_OneHundredThreeCarnegieCenterOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneHundredThreeCarnegieCenterOfficePropertyMember" xlink:to="cli_OneHundredThreeCarnegieCenterOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneHundredThreeCarnegieCenterOfficePropertyMember_lbl" xml:lang="en-US">One Hundred Three Carnegie Center Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneHundredThreeCarnegieCenterOfficePropertyMember_lbl" xml:lang="en-US">One Hundred Three Carnegie Center Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneHundredThreeCarnegieCenterOfficePropertyMember_lbl" xml:lang="en-US">103 Carnegie Center [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwoIndependenceWayOfficePropertyMember" xlink:label="cli_TwoIndependenceWayOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwoIndependenceWayOfficePropertyMember" xlink:to="cli_TwoIndependenceWayOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwoIndependenceWayOfficePropertyMember_lbl" xml:lang="en-US">Two Independence Way Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwoIndependenceWayOfficePropertyMember_lbl" xml:lang="en-US">Two Independence Way Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwoIndependenceWayOfficePropertyMember_lbl" xml:lang="en-US">2 Independence Way [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ThreeIndependenceWayOfficePropertyMember" xlink:label="cli_ThreeIndependenceWayOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ThreeIndependenceWayOfficePropertyMember" xlink:to="cli_ThreeIndependenceWayOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ThreeIndependenceWayOfficePropertyMember_lbl" xml:lang="en-US">Three Independence Way Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ThreeIndependenceWayOfficePropertyMember_lbl" xml:lang="en-US">Three Independence Way Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ThreeIndependenceWayOfficePropertyMember_lbl" xml:lang="en-US">3 Independence Way [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneHundredOverlookCenterOfficePropertyMember" xlink:label="cli_OneHundredOverlookCenterOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneHundredOverlookCenterOfficePropertyMember" xlink:to="cli_OneHundredOverlookCenterOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneHundredOverlookCenterOfficePropertyMember_lbl" xml:lang="en-US">One Hundred Overlook Center Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneHundredOverlookCenterOfficePropertyMember_lbl" xml:lang="en-US">One Hundred Overlook Center Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneHundredOverlookCenterOfficePropertyMember_lbl" xml:lang="en-US">100 Overlook Center [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FiveVaughnDriveOfficePropertyMember" xlink:label="cli_FiveVaughnDriveOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FiveVaughnDriveOfficePropertyMember" xlink:to="cli_FiveVaughnDriveOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FiveVaughnDriveOfficePropertyMember_lbl" xml:lang="en-US">Five Vaughn Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FiveVaughnDriveOfficePropertyMember_lbl" xml:lang="en-US">Five Vaughn Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FiveVaughnDriveOfficePropertyMember_lbl" xml:lang="en-US">5 Vaughn Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ThreeHundredSeventySevenSummerhillRoadOfficePropertyMember" xlink:label="cli_ThreeHundredSeventySevenSummerhillRoadOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ThreeHundredSeventySevenSummerhillRoadOfficePropertyMember" xlink:to="cli_ThreeHundredSeventySevenSummerhillRoadOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ThreeHundredSeventySevenSummerhillRoadOfficePropertyMember_lbl" xml:lang="en-US">Three Hundred Seventy Seven Summerhill Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ThreeHundredSeventySevenSummerhillRoadOfficePropertyMember_lbl" xml:lang="en-US">Three Hundred Seventy Seven Summerhill Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ThreeHundredSeventySevenSummerhillRoadOfficePropertyMember_lbl" xml:lang="en-US">377 Summerhill Road [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ThreeHundredFortyThreeThornallStreetOfficePropertyMember" xlink:label="cli_ThreeHundredFortyThreeThornallStreetOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ThreeHundredFortyThreeThornallStreetOfficePropertyMember" xlink:to="cli_ThreeHundredFortyThreeThornallStreetOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ThreeHundredFortyThreeThornallStreetOfficePropertyMember_lbl" xml:lang="en-US">Three Hundred Forty Three Thornall Street Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ThreeHundredFortyThreeThornallStreetOfficePropertyMember_lbl" xml:lang="en-US">Three Hundred Forty Three Thornall Street Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ThreeHundredFortyThreeThornallStreetOfficePropertyMember_lbl" xml:lang="en-US">343 Thornall Street [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ThirtyKnightsbridgeRoadBuildingsThreeOfficePropertyMember" xlink:label="cli_ThirtyKnightsbridgeRoadBuildingsThreeOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ThirtyKnightsbridgeRoadBuildingsThreeOfficePropertyMember" xlink:to="cli_ThirtyKnightsbridgeRoadBuildingsThreeOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ThirtyKnightsbridgeRoadBuildingsThreeOfficePropertyMember_lbl" xml:lang="en-US">Thirty Knightsbridge Road Buildings Three Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ThirtyKnightsbridgeRoadBuildingsThreeOfficePropertyMember_lbl" xml:lang="en-US">Thirty Knightsbridge Road Buildings Three Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ThirtyKnightsbridgeRoadBuildingsThreeOfficePropertyMember_lbl" xml:lang="en-US">30 Knightsbridge Road Building 3 [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ThirtyKnightsbridgeRoadBuildingsFourOfficePropertyMember" xlink:label="cli_ThirtyKnightsbridgeRoadBuildingsFourOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ThirtyKnightsbridgeRoadBuildingsFourOfficePropertyMember" xlink:to="cli_ThirtyKnightsbridgeRoadBuildingsFourOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ThirtyKnightsbridgeRoadBuildingsFourOfficePropertyMember_lbl" xml:lang="en-US">Thirty Knightsbridge Road Buildings Four Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ThirtyKnightsbridgeRoadBuildingsFourOfficePropertyMember_lbl" xml:lang="en-US">Thirty Knightsbridge Road Buildings Four Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ThirtyKnightsbridgeRoadBuildingsFourOfficePropertyMember_lbl" xml:lang="en-US">30 Knightsbridge Road Building 4 [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ThirtyKnightsbridgeRoadBuildingsFiveOfficePropertyMember" xlink:label="cli_ThirtyKnightsbridgeRoadBuildingsFiveOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ThirtyKnightsbridgeRoadBuildingsFiveOfficePropertyMember" xlink:to="cli_ThirtyKnightsbridgeRoadBuildingsFiveOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ThirtyKnightsbridgeRoadBuildingsFiveOfficePropertyMember_lbl" xml:lang="en-US">Thirty Knightsbridge Road Buildings Five Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ThirtyKnightsbridgeRoadBuildingsFiveOfficePropertyMember_lbl" xml:lang="en-US">Thirty Knightsbridge Road Buildings Five Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ThirtyKnightsbridgeRoadBuildingsFiveOfficePropertyMember_lbl" xml:lang="en-US">30 Knightsbridge Road Building 5 [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ThirtyKnightsbridgeRoadBuildingsSixOfficePropertyMember" xlink:label="cli_ThirtyKnightsbridgeRoadBuildingsSixOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ThirtyKnightsbridgeRoadBuildingsSixOfficePropertyMember" xlink:to="cli_ThirtyKnightsbridgeRoadBuildingsSixOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ThirtyKnightsbridgeRoadBuildingsSixOfficePropertyMember_lbl" xml:lang="en-US">Thirty Knightsbridge Road Buildings Six Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ThirtyKnightsbridgeRoadBuildingsSixOfficePropertyMember_lbl" xml:lang="en-US">Thirty Knightsbridge Road Buildings Six Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ThirtyKnightsbridgeRoadBuildingsSixOfficePropertyMember_lbl" xml:lang="en-US">30 Knightsbridge Road Building 6 [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FiveHundredCollegeRoadEastOfficePropertyMember" xlink:label="cli_FiveHundredCollegeRoadEastOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FiveHundredCollegeRoadEastOfficePropertyMember" xlink:to="cli_FiveHundredCollegeRoadEastOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FiveHundredCollegeRoadEastOfficePropertyMember_lbl" xml:lang="en-US">Five Hundred College Road East Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FiveHundredCollegeRoadEastOfficePropertyMember_lbl" xml:lang="en-US">Five Hundred College Road East Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FiveHundredCollegeRoadEastOfficePropertyMember_lbl" xml:lang="en-US">500 College Road East [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FiveHundredEightyOneMainStreetOfficePropertyMember" xlink:label="cli_FiveHundredEightyOneMainStreetOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FiveHundredEightyOneMainStreetOfficePropertyMember" xlink:to="cli_FiveHundredEightyOneMainStreetOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FiveHundredEightyOneMainStreetOfficePropertyMember_lbl" xml:lang="en-US">Five Hundred Eighty One Main Street Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FiveHundredEightyOneMainStreetOfficePropertyMember_lbl" xml:lang="en-US">Five Hundred Eighty One Main Street Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FiveHundredEightyOneMainStreetOfficePropertyMember_lbl" xml:lang="en-US">581 Main Street [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwoParagonWayOfficeProperyMember" xlink:label="cli_TwoParagonWayOfficeProperyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwoParagonWayOfficeProperyMember" xlink:to="cli_TwoParagonWayOfficeProperyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwoParagonWayOfficeProperyMember_lbl" xml:lang="en-US">Two Paragon Way Office Propery [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwoParagonWayOfficeProperyMember_lbl" xml:lang="en-US">Two Paragon Way Office Propery [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwoParagonWayOfficeProperyMember_lbl" xml:lang="en-US">2 Paragon Way [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ThreeParagonWayOfficeProperyMember" xlink:label="cli_ThreeParagonWayOfficeProperyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ThreeParagonWayOfficeProperyMember" xlink:to="cli_ThreeParagonWayOfficeProperyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ThreeParagonWayOfficeProperyMember_lbl" xml:lang="en-US">Three Paragon Way Office Propery [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ThreeParagonWayOfficeProperyMember_lbl" xml:lang="en-US">Three Paragon Way Office Propery [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ThreeParagonWayOfficeProperyMember_lbl" xml:lang="en-US">3 Paragon Way [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FourParagonWayOfficeProperyMember" xlink:label="cli_FourParagonWayOfficeProperyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FourParagonWayOfficeProperyMember" xlink:to="cli_FourParagonWayOfficeProperyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FourParagonWayOfficeProperyMember_lbl" xml:lang="en-US">Four Paragon Way Office Propery [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FourParagonWayOfficeProperyMember_lbl" xml:lang="en-US">Four Paragon Way Office Propery [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FourParagonWayOfficeProperyMember_lbl" xml:lang="en-US">4 Paragon Way [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_HundredWillowbrookRoadOfficePropertyMember" xlink:label="cli_HundredWillowbrookRoadOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_HundredWillowbrookRoadOfficePropertyMember" xlink:to="cli_HundredWillowbrookRoadOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_HundredWillowbrookRoadOfficePropertyMember_lbl" xml:lang="en-US">Hundred Willowbrook Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_HundredWillowbrookRoadOfficePropertyMember_lbl" xml:lang="en-US">Hundred Willowbrook Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_HundredWillowbrookRoadOfficePropertyMember_lbl" xml:lang="en-US">100 Willowbrook Road [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwentyThreeMainStreetOfficePropertyMember" xlink:label="cli_TwentyThreeMainStreetOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwentyThreeMainStreetOfficePropertyMember" xlink:to="cli_TwentyThreeMainStreetOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwentyThreeMainStreetOfficePropertyMember_lbl" xml:lang="en-US">Twenty Three Main Street Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwentyThreeMainStreetOfficePropertyMember_lbl" xml:lang="en-US">Twenty Three Main Street Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwentyThreeMainStreetOfficePropertyMember_lbl" xml:lang="en-US">23 Main Street [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneRiverCenterBuildingOneOfficePropertyMember" xlink:label="cli_OneRiverCenterBuildingOneOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneRiverCenterBuildingOneOfficePropertyMember" xlink:to="cli_OneRiverCenterBuildingOneOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneRiverCenterBuildingOneOfficePropertyMember_lbl" xml:lang="en-US">One River Center Building One Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneRiverCenterBuildingOneOfficePropertyMember_lbl" xml:lang="en-US">One River Center Building One Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneRiverCenterBuildingOneOfficePropertyMember_lbl" xml:lang="en-US">One River Center Building 1 [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneRiverCenterBuildingTwoOfficePropertyMember" xlink:label="cli_OneRiverCenterBuildingTwoOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneRiverCenterBuildingTwoOfficePropertyMember" xlink:to="cli_OneRiverCenterBuildingTwoOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneRiverCenterBuildingTwoOfficePropertyMember_lbl" xml:lang="en-US">One River Center Building Two Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneRiverCenterBuildingTwoOfficePropertyMember_lbl" xml:lang="en-US">One River Center Building Two Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneRiverCenterBuildingTwoOfficePropertyMember_lbl" xml:lang="en-US">One River Center Building 2 [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneRiverCenterBuildingThreeOfficePropertyMember" xlink:label="cli_OneRiverCenterBuildingThreeOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneRiverCenterBuildingThreeOfficePropertyMember" xlink:to="cli_OneRiverCenterBuildingThreeOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneRiverCenterBuildingThreeOfficePropertyMember_lbl" xml:lang="en-US">One River Center Building Three Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneRiverCenterBuildingThreeOfficePropertyMember_lbl" xml:lang="en-US">One River Center Building Three Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneRiverCenterBuildingThreeOfficePropertyMember_lbl" xml:lang="en-US">One River Center Building 3 [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ThreeThousandSixtySixRouteSixtySixOfficePropertyMember" xlink:label="cli_ThreeThousandSixtySixRouteSixtySixOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ThreeThousandSixtySixRouteSixtySixOfficePropertyMember" xlink:to="cli_ThreeThousandSixtySixRouteSixtySixOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ThreeThousandSixtySixRouteSixtySixOfficePropertyMember_lbl" xml:lang="en-US">Three Thousand Sixty Six Route Sixty Six Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ThreeThousandSixtySixRouteSixtySixOfficePropertyMember_lbl" xml:lang="en-US">Three Thousand Sixty Six Route Sixty Six Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ThreeThousandSixtySixRouteSixtySixOfficePropertyMember_lbl" xml:lang="en-US">3600 Route 66 [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneThousandThreeHundredFiveCampusParkwayOfficePropertyMember" xlink:label="cli_OneThousandThreeHundredFiveCampusParkwayOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneThousandThreeHundredFiveCampusParkwayOfficePropertyMember" xlink:to="cli_OneThousandThreeHundredFiveCampusParkwayOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneThousandThreeHundredFiveCampusParkwayOfficePropertyMember_lbl" xml:lang="en-US">One Thousand Three Hundred Five Campus Parkway Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneThousandThreeHundredFiveCampusParkwayOfficePropertyMember_lbl" xml:lang="en-US">One Thousand Three Hundred Five Campus Parkway Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneThousandThreeHundredFiveCampusParkwayOfficePropertyMember_lbl" xml:lang="en-US">1305 Campus Parkway [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneThousandThreeHundredTwentyFiveCampusParkwayOfficeOrFlexPropertyMember" xlink:label="cli_OneThousandThreeHundredTwentyFiveCampusParkwayOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneThousandThreeHundredTwentyFiveCampusParkwayOfficeOrFlexPropertyMember" xlink:to="cli_OneThousandThreeHundredTwentyFiveCampusParkwayOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneThousandThreeHundredTwentyFiveCampusParkwayOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Thousand Three Hundred Twenty Five Campus Parkway Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneThousandThreeHundredTwentyFiveCampusParkwayOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Thousand Three Hundred Twenty Five Campus Parkway Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneThousandThreeHundredTwentyFiveCampusParkwayOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">1325 Campus Parkway [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneThousandThreeHundredFortyCampusParkwayOfficeOrFlexPropertyMember" xlink:label="cli_OneThousandThreeHundredFortyCampusParkwayOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneThousandThreeHundredFortyCampusParkwayOfficeOrFlexPropertyMember" xlink:to="cli_OneThousandThreeHundredFortyCampusParkwayOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneThousandThreeHundredFortyCampusParkwayOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Thousand Three Hundred Forty Campus Parkway Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneThousandThreeHundredFortyCampusParkwayOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Thousand Three Hundred Forty Campus Parkway Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneThousandThreeHundredFortyCampusParkwayOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">1340 Campus Parkway [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneThousandThreeHundredFortyFiveCampusParkwayOfficeOrFlexPropertyMember" xlink:label="cli_OneThousandThreeHundredFortyFiveCampusParkwayOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneThousandThreeHundredFortyFiveCampusParkwayOfficeOrFlexPropertyMember" xlink:to="cli_OneThousandThreeHundredFortyFiveCampusParkwayOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneThousandThreeHundredFortyFiveCampusParkwayOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Thousand Three Hundred Forty Five Campus Parkway Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneThousandThreeHundredFortyFiveCampusParkwayOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Thousand Three Hundred Forty Five Campus Parkway Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneThousandThreeHundredFortyFiveCampusParkwayOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">1345 Campus Parkway [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneThousandThreeHundredFiftyCampusParkwayOfficePropertyMember" xlink:label="cli_OneThousandThreeHundredFiftyCampusParkwayOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneThousandThreeHundredFiftyCampusParkwayOfficePropertyMember" xlink:to="cli_OneThousandThreeHundredFiftyCampusParkwayOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneThousandThreeHundredFiftyCampusParkwayOfficePropertyMember_lbl" xml:lang="en-US">One Thousand Three Hundred Fifty Campus Parkway Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneThousandThreeHundredFiftyCampusParkwayOfficePropertyMember_lbl" xml:lang="en-US">One Thousand Three Hundred Fifty Campus Parkway Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneThousandThreeHundredFiftyCampusParkwayOfficePropertyMember_lbl" xml:lang="en-US">1350 Campus Parkway [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneThousandFourHundredThirtyThreeHighwayThirtyFourOfficeOrFlexPropertyMember" xlink:label="cli_OneThousandFourHundredThirtyThreeHighwayThirtyFourOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneThousandFourHundredThirtyThreeHighwayThirtyFourOfficeOrFlexPropertyMember" xlink:to="cli_OneThousandFourHundredThirtyThreeHighwayThirtyFourOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneThousandFourHundredThirtyThreeHighwayThirtyFourOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Thousand Four Hundred Thirty Three Highway Thirty Four Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneThousandFourHundredThirtyThreeHighwayThirtyFourOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Thousand Four Hundred Thirty Three Highway Thirty Four Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneThousandFourHundredThirtyThreeHighwayThirtyFourOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">1433 Highway 34 [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneThousandThreeHundredTwentyWyckoffAvenueOfficeOrFlexPropertyMember" xlink:label="cli_OneThousandThreeHundredTwentyWyckoffAvenueOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneThousandThreeHundredTwentyWyckoffAvenueOfficeOrFlexPropertyMember" xlink:to="cli_OneThousandThreeHundredTwentyWyckoffAvenueOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneThousandThreeHundredTwentyWyckoffAvenueOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Thousand Three Hundred Twenty Wyckoff Avenue Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneThousandThreeHundredTwentyWyckoffAvenueOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Thousand Three Hundred Twenty Wyckoff Avenue Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneThousandThreeHundredTwentyWyckoffAvenueOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">1320 Wyckoff Avenue [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneThousandThreeHundredTwentyFourWyckoffAvenueOfficeOrFlexPropertyMember" xlink:label="cli_OneThousandThreeHundredTwentyFourWyckoffAvenueOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneThousandThreeHundredTwentyFourWyckoffAvenueOfficeOrFlexPropertyMember" xlink:to="cli_OneThousandThreeHundredTwentyFourWyckoffAvenueOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneThousandThreeHundredTwentyFourWyckoffAvenueOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Thousand Three Hundred Twenty Four Wyckoff Avenue Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneThousandThreeHundredTwentyFourWyckoffAvenueOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Thousand Three Hundred Twenty Four Wyckoff Avenue Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneThousandThreeHundredTwentyFourWyckoffAvenueOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">1324 Wyckoff Avenue [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ThreeHundredTwentyFiveColumbiaParkwayOfficePropertyMember" xlink:label="cli_ThreeHundredTwentyFiveColumbiaParkwayOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ThreeHundredTwentyFiveColumbiaParkwayOfficePropertyMember" xlink:to="cli_ThreeHundredTwentyFiveColumbiaParkwayOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ThreeHundredTwentyFiveColumbiaParkwayOfficePropertyMember_lbl" xml:lang="en-US">Three Hundred Twenty Five Columbia Parkway Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ThreeHundredTwentyFiveColumbiaParkwayOfficePropertyMember_lbl" xml:lang="en-US">Three Hundred Twenty Five Columbia Parkway Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ThreeHundredTwentyFiveColumbiaParkwayOfficePropertyMember_lbl" xml:lang="en-US">325 Columbia Parkway [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwoHundredFiftyJohnsonRoadOfficePropertyMember" xlink:label="cli_TwoHundredFiftyJohnsonRoadOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwoHundredFiftyJohnsonRoadOfficePropertyMember" xlink:to="cli_TwoHundredFiftyJohnsonRoadOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwoHundredFiftyJohnsonRoadOfficePropertyMember_lbl" xml:lang="en-US">Two Hundred Fifty Johnson Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwoHundredFiftyJohnsonRoadOfficePropertyMember_lbl" xml:lang="en-US">Two Hundred Fifty Johnson Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwoHundredFiftyJohnsonRoadOfficePropertyMember_lbl" xml:lang="en-US">250 Johnson Road [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwoHundredOneLittletonRoadOfficePropertyMember" xlink:label="cli_TwoHundredOneLittletonRoadOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwoHundredOneLittletonRoadOfficePropertyMember" xlink:to="cli_TwoHundredOneLittletonRoadOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwoHundredOneLittletonRoadOfficePropertyMember_lbl" xml:lang="en-US">Two Hundred One Littleton Road  Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwoHundredOneLittletonRoadOfficePropertyMember_lbl" xml:lang="en-US">Two Hundred One Littleton Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwoHundredOneLittletonRoadOfficePropertyMember_lbl" xml:lang="en-US">201 Littleton Road [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FourHundredTwelveMtKembleAvenueOfficePropertyMember" xlink:label="cli_FourHundredTwelveMtKembleAvenueOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FourHundredTwelveMtKembleAvenueOfficePropertyMember" xlink:to="cli_FourHundredTwelveMtKembleAvenueOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FourHundredTwelveMtKembleAvenueOfficePropertyMember_lbl" xml:lang="en-US">Four Hundred Twelve Mt Kemble Avenue Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FourHundredTwelveMtKembleAvenueOfficePropertyMember_lbl" xml:lang="en-US">Four Hundred Twelve Mt Kemble Avenue Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FourHundredTwelveMtKembleAvenueOfficePropertyMember_lbl" xml:lang="en-US">412 Mt. Kemble Avenue [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FourCampusDriveOfficePropertyMember" xlink:label="cli_FourCampusDriveOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FourCampusDriveOfficePropertyMember" xlink:to="cli_FourCampusDriveOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FourCampusDriveOfficePropertyMember_lbl" xml:lang="en-US">Four Campus Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FourCampusDriveOfficePropertyMember_lbl" xml:lang="en-US">Four Campus Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FourCampusDriveOfficePropertyMember_lbl" xml:lang="en-US">4 Campus Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_SixCampusDriveOfficePropertyMember" xlink:label="cli_SixCampusDriveOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_SixCampusDriveOfficePropertyMember" xlink:to="cli_SixCampusDriveOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_SixCampusDriveOfficePropertyMember_lbl" xml:lang="en-US">Six Campus Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_SixCampusDriveOfficePropertyMember_lbl" xml:lang="en-US">Six Campus Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_SixCampusDriveOfficePropertyMember_lbl" xml:lang="en-US">6 Campus Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_SevenCampusDriveOfficePropertyMember" xlink:label="cli_SevenCampusDriveOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_SevenCampusDriveOfficePropertyMember" xlink:to="cli_SevenCampusDriveOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_SevenCampusDriveOfficePropertyMember_lbl" xml:lang="en-US">Seven Campus Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_SevenCampusDriveOfficePropertyMember_lbl" xml:lang="en-US">Seven Campus Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_SevenCampusDriveOfficePropertyMember_lbl" xml:lang="en-US">7 Campus Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_EightCampusDriveOfficePropertyMember" xlink:label="cli_EightCampusDriveOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_EightCampusDriveOfficePropertyMember" xlink:to="cli_EightCampusDriveOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_EightCampusDriveOfficePropertyMember_lbl" xml:lang="en-US">Eight Campus Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_EightCampusDriveOfficePropertyMember_lbl" xml:lang="en-US">Eight Campus Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_EightCampusDriveOfficePropertyMember_lbl" xml:lang="en-US">8 Campus Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_NineCampusDriveOfficePropertyMember" xlink:label="cli_NineCampusDriveOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_NineCampusDriveOfficePropertyMember" xlink:to="cli_NineCampusDriveOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_NineCampusDriveOfficePropertyMember_lbl" xml:lang="en-US">Nine Campus Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_NineCampusDriveOfficePropertyMember_lbl" xml:lang="en-US">Nine Campus Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_NineCampusDriveOfficePropertyMember_lbl" xml:lang="en-US">9 Campus Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FourCenturyDriveOfficePropertyMember" xlink:label="cli_FourCenturyDriveOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FourCenturyDriveOfficePropertyMember" xlink:to="cli_FourCenturyDriveOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FourCenturyDriveOfficePropertyMember_lbl" xml:lang="en-US">Four Century Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FourCenturyDriveOfficePropertyMember_lbl" xml:lang="en-US">Four Century Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FourCenturyDriveOfficePropertyMember_lbl" xml:lang="en-US">4 Century Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FiveCenturyDriveOfficePropertyMember" xlink:label="cli_FiveCenturyDriveOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FiveCenturyDriveOfficePropertyMember" xlink:to="cli_FiveCenturyDriveOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FiveCenturyDriveOfficePropertyMember_lbl" xml:lang="en-US">Five Century Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FiveCenturyDriveOfficePropertyMember_lbl" xml:lang="en-US">Five Century Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FiveCenturyDriveOfficePropertyMember_lbl" xml:lang="en-US">5 Century Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_SixCenturyDriveOfficePropertyMember" xlink:label="cli_SixCenturyDriveOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_SixCenturyDriveOfficePropertyMember" xlink:to="cli_SixCenturyDriveOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_SixCenturyDriveOfficePropertyMember_lbl" xml:lang="en-US">Six Century Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_SixCenturyDriveOfficePropertyMember_lbl" xml:lang="en-US">Six Century Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_SixCenturyDriveOfficePropertyMember_lbl" xml:lang="en-US">6 Century Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwoDrydenWayOfficePropertyMember" xlink:label="cli_TwoDrydenWayOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwoDrydenWayOfficePropertyMember" xlink:to="cli_TwoDrydenWayOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwoDrydenWayOfficePropertyMember_lbl" xml:lang="en-US">Two Dryden Way Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwoDrydenWayOfficePropertyMember_lbl" xml:lang="en-US">Two Dryden Way Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwoDrydenWayOfficePropertyMember_lbl" xml:lang="en-US">2 Dryden Way [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FourGatehallDriveOfficePropertyMember" xlink:label="cli_FourGatehallDriveOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FourGatehallDriveOfficePropertyMember" xlink:to="cli_FourGatehallDriveOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FourGatehallDriveOfficePropertyMember_lbl" xml:lang="en-US">Four Gatehall Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FourGatehallDriveOfficePropertyMember_lbl" xml:lang="en-US">Four Gatehall Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FourGatehallDriveOfficePropertyMember_lbl" xml:lang="en-US">4 Gatehall Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwoHiltonCourtOfficePropertyMember" xlink:label="cli_TwoHiltonCourtOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwoHiltonCourtOfficePropertyMember" xlink:to="cli_TwoHiltonCourtOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwoHiltonCourtOfficePropertyMember_lbl" xml:lang="en-US">Two Hilton Court Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwoHiltonCourtOfficePropertyMember_lbl" xml:lang="en-US">Two Hilton Court Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwoHiltonCourtOfficePropertyMember_lbl" xml:lang="en-US">2 Hilton Court [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneThousandSixHundredThirtyThreeLittletonRoadOfficePropertyMember" xlink:label="cli_OneThousandSixHundredThirtyThreeLittletonRoadOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneThousandSixHundredThirtyThreeLittletonRoadOfficePropertyMember" xlink:to="cli_OneThousandSixHundredThirtyThreeLittletonRoadOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneThousandSixHundredThirtyThreeLittletonRoadOfficePropertyMember_lbl" xml:lang="en-US">One Thousand Six Hundred Thirty Three Littleton Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneThousandSixHundredThirtyThreeLittletonRoadOfficePropertyMember_lbl" xml:lang="en-US">One Thousand Six Hundred Thirty Three Littleton Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneThousandSixHundredThirtyThreeLittletonRoadOfficePropertyMember_lbl" xml:lang="en-US">1633 Littleton Road [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_SixHundredParsippanyRoadOfficePropertyMember" xlink:label="cli_SixHundredParsippanyRoadOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_SixHundredParsippanyRoadOfficePropertyMember" xlink:to="cli_SixHundredParsippanyRoadOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_SixHundredParsippanyRoadOfficePropertyMember_lbl" xml:lang="en-US">Six Hundred Parsippany Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_SixHundredParsippanyRoadOfficePropertyMember_lbl" xml:lang="en-US">Six Hundred Parsippany Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_SixHundredParsippanyRoadOfficePropertyMember_lbl" xml:lang="en-US">600 Parsippany Road [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneSylvanWayOfficePropertyMember" xlink:label="cli_OneSylvanWayOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneSylvanWayOfficePropertyMember" xlink:to="cli_OneSylvanWayOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneSylvanWayOfficePropertyMember_lbl" xml:lang="en-US">One Sylvan Way Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneSylvanWayOfficePropertyMember_lbl" xml:lang="en-US">One Sylvan Way Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneSylvanWayOfficePropertyMember_lbl" xml:lang="en-US">1 Sylvan Way [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FourSylvanWayOfficePropertyMember" xlink:label="cli_FourSylvanWayOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FourSylvanWayOfficePropertyMember" xlink:to="cli_FourSylvanWayOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FourSylvanWayOfficePropertyMember_lbl" xml:lang="en-US">Four Sylvan Way Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FourSylvanWayOfficePropertyMember_lbl" xml:lang="en-US">Four Sylvan Way Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FourSylvanWayOfficePropertyMember_lbl" xml:lang="en-US">4 Sylvan Way [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FiveSylvanWayOfficePropertyMember" xlink:label="cli_FiveSylvanWayOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FiveSylvanWayOfficePropertyMember" xlink:to="cli_FiveSylvanWayOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FiveSylvanWayOfficePropertyMember_lbl" xml:lang="en-US">Five Sylvan Way Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FiveSylvanWayOfficePropertyMember_lbl" xml:lang="en-US">Five Sylvan Way Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FiveSylvanWayOfficePropertyMember_lbl" xml:lang="en-US">5 Sylvan Way [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_SevenSylvanWayOfficePropertyMember" xlink:label="cli_SevenSylvanWayOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_SevenSylvanWayOfficePropertyMember" xlink:to="cli_SevenSylvanWayOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_SevenSylvanWayOfficePropertyMember_lbl" xml:lang="en-US">Seven Sylvan Way Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_SevenSylvanWayOfficePropertyMember_lbl" xml:lang="en-US">Seven Sylvan Way Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_SevenSylvanWayOfficePropertyMember_lbl" xml:lang="en-US">7 Sylvan Way [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwentyTwoSylvanWayOfficePropertyMember" xlink:label="cli_TwentyTwoSylvanWayOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwentyTwoSylvanWayOfficePropertyMember" xlink:to="cli_TwentyTwoSylvanWayOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwentyTwoSylvanWayOfficePropertyMember_lbl" xml:lang="en-US">Twenty Two Sylvan Way Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwentyTwoSylvanWayOfficePropertyMember_lbl" xml:lang="en-US">Twenty Two Sylvan Way Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwentyTwoSylvanWayOfficePropertyMember_lbl" xml:lang="en-US">22 Sylvan Way [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwentyWaterviewBoulevardOfficePropertyMember" xlink:label="cli_TwentyWaterviewBoulevardOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwentyWaterviewBoulevardOfficePropertyMember" xlink:to="cli_TwentyWaterviewBoulevardOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwentyWaterviewBoulevardOfficePropertyMember_lbl" xml:lang="en-US">Twenty Waterview Boulevard Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwentyWaterviewBoulevardOfficePropertyMember_lbl" xml:lang="en-US">Twenty Waterview Boulevard Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwentyWaterviewBoulevardOfficePropertyMember_lbl" xml:lang="en-US">20 Waterview Boulevard [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ThirtyFiveWaterviewBoulevardOfficePropertyMember" xlink:label="cli_ThirtyFiveWaterviewBoulevardOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ThirtyFiveWaterviewBoulevardOfficePropertyMember" xlink:to="cli_ThirtyFiveWaterviewBoulevardOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ThirtyFiveWaterviewBoulevardOfficePropertyMember_lbl" xml:lang="en-US">Thirty Five Waterview Boulevard Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ThirtyFiveWaterviewBoulevardOfficePropertyMember_lbl" xml:lang="en-US">Thirty Five Waterview Boulevard Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ThirtyFiveWaterviewBoulevardOfficePropertyMember_lbl" xml:lang="en-US">35 Waterview Boulevard [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FiveWoodHollowRoadOfficePropertyMember" xlink:label="cli_FiveWoodHollowRoadOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FiveWoodHollowRoadOfficePropertyMember" xlink:to="cli_FiveWoodHollowRoadOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FiveWoodHollowRoadOfficePropertyMember_lbl" xml:lang="en-US">Five Wood Hollow Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FiveWoodHollowRoadOfficePropertyMember_lbl" xml:lang="en-US">Five Wood Hollow Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FiveWoodHollowRoadOfficePropertyMember_lbl" xml:lang="en-US">5 Wood Hollow Road [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_SevenHundredSeventySevenPassaicAvenueOfficePropertyMember" xlink:label="cli_SevenHundredSeventySevenPassaicAvenueOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_SevenHundredSeventySevenPassaicAvenueOfficePropertyMember" xlink:to="cli_SevenHundredSeventySevenPassaicAvenueOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_SevenHundredSeventySevenPassaicAvenueOfficePropertyMember_lbl" xml:lang="en-US">Seven Hundred Seventy Seven Passaic Avenue Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_SevenHundredSeventySevenPassaicAvenueOfficePropertyMember_lbl" xml:lang="en-US">Seven Hundred Seventy Seven Passaic Avenue Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_SevenHundredSeventySevenPassaicAvenueOfficePropertyMember_lbl" xml:lang="en-US">777 Passaic Avenue [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneCenterCourtOfficeOrFlexPropertyMember" xlink:label="cli_OneCenterCourtOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneCenterCourtOfficeOrFlexPropertyMember" xlink:to="cli_OneCenterCourtOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneCenterCourtOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Center Court Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneCenterCourtOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Center Court Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneCenterCourtOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">1 Center Court [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwoCenterCourtOfficeOrFlexPropertyMember" xlink:label="cli_TwoCenterCourtOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwoCenterCourtOfficeOrFlexPropertyMember" xlink:to="cli_TwoCenterCourtOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwoCenterCourtOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Two Center Court Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwoCenterCourtOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Two Center Court Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwoCenterCourtOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">2 Center Court [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ElevenCommerceWayOfficeOrFlexPropertyMember" xlink:label="cli_ElevenCommerceWayOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ElevenCommerceWayOfficeOrFlexPropertyMember" xlink:to="cli_ElevenCommerceWayOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ElevenCommerceWayOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Eleven Commerce Way Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ElevenCommerceWayOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Eleven Commerce Way Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ElevenCommerceWayOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">11 Commerce Way [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwentyCommerceWayOfficeOrFlexPropertyMember" xlink:label="cli_TwentyCommerceWayOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwentyCommerceWayOfficeOrFlexPropertyMember" xlink:to="cli_TwentyCommerceWayOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwentyCommerceWayOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Twenty Commerce Way Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwentyCommerceWayOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Twenty Commerce Way Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwentyCommerceWayOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">20 Commerce Way [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwentyNineCommerceWayOfficeOrFlexPropertyMember" xlink:label="cli_TwentyNineCommerceWayOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwentyNineCommerceWayOfficeOrFlexPropertyMember" xlink:to="cli_TwentyNineCommerceWayOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwentyNineCommerceWayOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Twenty Nine Commerce Way Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwentyNineCommerceWayOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Twenty Nine Commerce Way Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwentyNineCommerceWayOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">29 Commerce Way [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FortyCommerceWayOfficeOrFlexPropertyMember" xlink:label="cli_FortyCommerceWayOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FortyCommerceWayOfficeOrFlexPropertyMember" xlink:to="cli_FortyCommerceWayOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FortyCommerceWayOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Forty Commerce Way Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FortyCommerceWayOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Forty Commerce Way Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FortyCommerceWayOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">40 Commerce Way [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FortyFiveCommerceWayOfficeOrFlexPropertyMember" xlink:label="cli_FortyFiveCommerceWayOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FortyFiveCommerceWayOfficeOrFlexPropertyMember" xlink:to="cli_FortyFiveCommerceWayOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FortyFiveCommerceWayOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Forty Five Commerce Way Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FortyFiveCommerceWayOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Forty Five Commerce Way Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FortyFiveCommerceWayOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">45 Commerce Way [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_SixtyCommerceWayOfficeOrFlexPropertyMember" xlink:label="cli_SixtyCommerceWayOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_SixtyCommerceWayOfficeOrFlexPropertyMember" xlink:to="cli_SixtyCommerceWayOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_SixtyCommerceWayOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Sixty Commerce Way Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_SixtyCommerceWayOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Sixty Commerce Way Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_SixtyCommerceWayOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">60 Commerce Way [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_EightyCommerceWayOfficeOrFlexPropertyMember" xlink:label="cli_EightyCommerceWayOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_EightyCommerceWayOfficeOrFlexPropertyMember" xlink:to="cli_EightyCommerceWayOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_EightyCommerceWayOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Eighty Commerce Way Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_EightyCommerceWayOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Eighty Commerce Way Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_EightyCommerceWayOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">80 Commerce Way [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneHundredCommerceWayOfficeOrFlexPropertyMember" xlink:label="cli_OneHundredCommerceWayOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneHundredCommerceWayOfficeOrFlexPropertyMember" xlink:to="cli_OneHundredCommerceWayOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneHundredCommerceWayOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Hundred Commerce Way Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneHundredCommerceWayOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Hundred Commerce Way Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneHundredCommerceWayOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">100 Commerce Way [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneTwentyCommerceWayOfficeOrFlexPropertyMember" xlink:label="cli_OneTwentyCommerceWayOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneTwentyCommerceWayOfficeOrFlexPropertyMember" xlink:to="cli_OneTwentyCommerceWayOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneTwentyCommerceWayOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Twenty Commerce Way Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneTwentyCommerceWayOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Twenty Commerce Way Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneTwentyCommerceWayOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">120 Commerce Way [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneFourtyCommerceWayOfficeOrFlexPropertyMember" xlink:label="cli_OneFourtyCommerceWayOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneFourtyCommerceWayOfficeOrFlexPropertyMember" xlink:to="cli_OneFourtyCommerceWayOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneFourtyCommerceWayOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Fourty Commerce Way Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneFourtyCommerceWayOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Fourty Commerce Way Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneFourtyCommerceWayOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">140 Commerce Way [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_NineHundredNinetyNineRiverviewDriveOfficeOrFlexPropertyMember" xlink:label="cli_NineHundredNinetyNineRiverviewDriveOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_NineHundredNinetyNineRiverviewDriveOfficeOrFlexPropertyMember" xlink:to="cli_NineHundredNinetyNineRiverviewDriveOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_NineHundredNinetyNineRiverviewDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Nine Hundred Ninety Nine Riverview Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_NineHundredNinetyNineRiverviewDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Nine Hundred Ninety Nine Riverview Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_NineHundredNinetyNineRiverviewDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">999 Riverview Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwoHundredTwentyTwoMtAiryRoadOfficePropertyMember" xlink:label="cli_TwoHundredTwentyTwoMtAiryRoadOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwoHundredTwentyTwoMtAiryRoadOfficePropertyMember" xlink:to="cli_TwoHundredTwentyTwoMtAiryRoadOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwoHundredTwentyTwoMtAiryRoadOfficePropertyMember_lbl" xml:lang="en-US">Two Hundred Twenty Two Mt Airy Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwoHundredTwentyTwoMtAiryRoadOfficePropertyMember_lbl" xml:lang="en-US">Two Hundred Twenty Two Mt Airy Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwoHundredTwentyTwoMtAiryRoadOfficePropertyMember_lbl" xml:lang="en-US">222 Mt. Airy Road [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwoHundredThirtyThreeMtAiryRoadOfficePropertyMember" xlink:label="cli_TwoHundredThirtyThreeMtAiryRoadOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwoHundredThirtyThreeMtAiryRoadOfficePropertyMember" xlink:to="cli_TwoHundredThirtyThreeMtAiryRoadOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwoHundredThirtyThreeMtAiryRoadOfficePropertyMember_lbl" xml:lang="en-US">Two Hundred Thirty Three Mt Airy Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwoHundredThirtyThreeMtAiryRoadOfficePropertyMember_lbl" xml:lang="en-US">Two Hundred Thirty Three Mt Airy Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwoHundredThirtyThreeMtAiryRoadOfficePropertyMember_lbl" xml:lang="en-US">233 Mt. Airy Road [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneHundredSixAllenRoadOfficePropertyMember" xlink:label="cli_OneHundredSixAllenRoadOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneHundredSixAllenRoadOfficePropertyMember" xlink:to="cli_OneHundredSixAllenRoadOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneHundredSixAllenRoadOfficePropertyMember_lbl" xml:lang="en-US">One Hundred Six Allen Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneHundredSixAllenRoadOfficePropertyMember_lbl" xml:lang="en-US">One Hundred Six Allen Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneHundredSixAllenRoadOfficePropertyMember_lbl" xml:lang="en-US">106 Allen Road [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FiftyOneImcloneDriveOfficePropertyMember" xlink:label="cli_FiftyOneImcloneDriveOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FiftyOneImcloneDriveOfficePropertyMember" xlink:to="cli_FiftyOneImcloneDriveOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FiftyOneImcloneDriveOfficePropertyMember_lbl" xml:lang="en-US">Fifty One Imclone Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FiftyOneImcloneDriveOfficePropertyMember_lbl" xml:lang="en-US">Fifty One Imclone Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FiftyOneImcloneDriveOfficePropertyMember_lbl" xml:lang="en-US">51 Imclone Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FiftyFiveCorporateDriveMember" xlink:label="cli_FiftyFiveCorporateDriveMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FiftyFiveCorporateDriveMember" xlink:to="cli_FiftyFiveCorporateDriveMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FiftyFiveCorporateDriveMember_lbl" xml:lang="en-US">Fifty Five Corporate Drive [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FiftyFiveCorporateDriveMember_lbl" xml:lang="en-US">Fifty Five Corporate Drive [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FiftyFiveCorporateDriveMember_lbl" xml:lang="en-US">55 Corporate Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FourHundredFortyRouteTwentyTwoEastOfficePropertyMember" xlink:label="cli_FourHundredFortyRouteTwentyTwoEastOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FourHundredFortyRouteTwentyTwoEastOfficePropertyMember" xlink:to="cli_FourHundredFortyRouteTwentyTwoEastOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FourHundredFortyRouteTwentyTwoEastOfficePropertyMember_lbl" xml:lang="en-US">Four Hundred Forty Route Twenty Two East Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FourHundredFortyRouteTwentyTwoEastOfficePropertyMember_lbl" xml:lang="en-US">Four Hundred Forty Route Twenty Two East Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FourHundredFortyRouteTwentyTwoEastOfficePropertyMember_lbl" xml:lang="en-US">440 Route 22 East [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_SevenHundredTwentyOneRouteTwoHundredTwoByTwoHundredSixOfficePropertyMember" xlink:label="cli_SevenHundredTwentyOneRouteTwoHundredTwoByTwoHundredSixOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_SevenHundredTwentyOneRouteTwoHundredTwoByTwoHundredSixOfficePropertyMember" xlink:to="cli_SevenHundredTwentyOneRouteTwoHundredTwoByTwoHundredSixOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_SevenHundredTwentyOneRouteTwoHundredTwoByTwoHundredSixOfficePropertyMember_lbl" xml:lang="en-US">Seven Hundred Twenty One Route Two Hundred Two By Two Hundred Six Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_SevenHundredTwentyOneRouteTwoHundredTwoByTwoHundredSixOfficePropertyMember_lbl" xml:lang="en-US">Seven Hundred Twenty One Route Two Hundred Two By Two Hundred Six Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_SevenHundredTwentyOneRouteTwoHundredTwoByTwoHundredSixOfficePropertyMember_lbl" xml:lang="en-US">721 Route 202/206 [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TenIndependenceBoulevardOfficePropertyMember" xlink:label="cli_TenIndependenceBoulevardOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TenIndependenceBoulevardOfficePropertyMember" xlink:to="cli_TenIndependenceBoulevardOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TenIndependenceBoulevardOfficePropertyMember_lbl" xml:lang="en-US">Ten Independence Boulevard Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TenIndependenceBoulevardOfficePropertyMember_lbl" xml:lang="en-US">Ten Independence Boulevard Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TenIndependenceBoulevardOfficePropertyMember_lbl" xml:lang="en-US">10 Independence Boulevard [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneHundredWalnutAvenueOfficePropertyMember" xlink:label="cli_OneHundredWalnutAvenueOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneHundredWalnutAvenueOfficePropertyMember" xlink:to="cli_OneHundredWalnutAvenueOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneHundredWalnutAvenueOfficePropertyMember_lbl" xml:lang="en-US">One Hundred Walnut Avenue Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneHundredWalnutAvenueOfficePropertyMember_lbl" xml:lang="en-US">One Hundred Walnut Avenue Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneHundredWalnutAvenueOfficePropertyMember_lbl" xml:lang="en-US">100 Walnut Avenue [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_SixCommerceDriveOfficePropertyMember" xlink:label="cli_SixCommerceDriveOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_SixCommerceDriveOfficePropertyMember" xlink:to="cli_SixCommerceDriveOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_SixCommerceDriveOfficePropertyMember_lbl" xml:lang="en-US">Six Commerce Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_SixCommerceDriveOfficePropertyMember_lbl" xml:lang="en-US">Six Commerce Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_SixCommerceDriveOfficePropertyMember_lbl" xml:lang="en-US">6 Commerce Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ElevenCommerceDriveOfficePropertyMember" xlink:label="cli_ElevenCommerceDriveOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ElevenCommerceDriveOfficePropertyMember" xlink:to="cli_ElevenCommerceDriveOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ElevenCommerceDriveOfficePropertyMember_lbl" xml:lang="en-US">Eleven Commerce Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ElevenCommerceDriveOfficePropertyMember_lbl" xml:lang="en-US">Eleven Commerce Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ElevenCommerceDriveOfficePropertyMember_lbl" xml:lang="en-US">11 Commerce Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwelveCommerceDriveOfficePropertyMember" xlink:label="cli_TwelveCommerceDriveOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwelveCommerceDriveOfficePropertyMember" xlink:to="cli_TwelveCommerceDriveOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwelveCommerceDriveOfficePropertyMember_lbl" xml:lang="en-US">Twelve Commerce Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwelveCommerceDriveOfficePropertyMember_lbl" xml:lang="en-US">Twelve Commerce Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwelveCommerceDriveOfficePropertyMember_lbl" xml:lang="en-US">12 Commerce Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FourteenCommerceDriveOfficePropertyMember" xlink:label="cli_FourteenCommerceDriveOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FourteenCommerceDriveOfficePropertyMember" xlink:to="cli_FourteenCommerceDriveOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FourteenCommerceDriveOfficePropertyMember_lbl" xml:lang="en-US">Fourteen Commerce Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FourteenCommerceDriveOfficePropertyMember_lbl" xml:lang="en-US">Fourteen Commerce Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FourteenCommerceDriveOfficePropertyMember_lbl" xml:lang="en-US">14 Commerce Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwentyCommerceDriveOfficePropertyMember" xlink:label="cli_TwentyCommerceDriveOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwentyCommerceDriveOfficePropertyMember" xlink:to="cli_TwentyCommerceDriveOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwentyCommerceDriveOfficePropertyMember_lbl" xml:lang="en-US">Twenty Commerce Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwentyCommerceDriveOfficePropertyMember_lbl" xml:lang="en-US">Twenty Commerce Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwentyCommerceDriveOfficePropertyMember_lbl" xml:lang="en-US">20 Commerce Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwentyFiveCommerceDriveOfficePropertyMember" xlink:label="cli_TwentyFiveCommerceDriveOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwentyFiveCommerceDriveOfficePropertyMember" xlink:to="cli_TwentyFiveCommerceDriveOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwentyFiveCommerceDriveOfficePropertyMember_lbl" xml:lang="en-US">Twenty Five Commerce Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwentyFiveCommerceDriveOfficePropertyMember_lbl" xml:lang="en-US">Twenty Five Commerce Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwentyFiveCommerceDriveOfficePropertyMember_lbl" xml:lang="en-US">25 Commerce Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_SixtyFiveJacksonDriveOfficePropertyMember" xlink:label="cli_SixtyFiveJacksonDriveOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_SixtyFiveJacksonDriveOfficePropertyMember" xlink:to="cli_SixtyFiveJacksonDriveOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_SixtyFiveJacksonDriveOfficePropertyMember_lbl" xml:lang="en-US">Sixty Five Jackson Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_SixtyFiveJacksonDriveOfficePropertyMember_lbl" xml:lang="en-US">Sixty Five Jackson Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_SixtyFiveJacksonDriveOfficePropertyMember_lbl" xml:lang="en-US">65 Jackson Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_EightHundredNinetyMountainRoadofficePropertyMember" xlink:label="cli_EightHundredNinetyMountainRoadofficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_EightHundredNinetyMountainRoadofficePropertyMember" xlink:to="cli_EightHundredNinetyMountainRoadofficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_EightHundredNinetyMountainRoadofficePropertyMember_lbl" xml:lang="en-US">Eight Hundred Ninety Mountain RoadOffice Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_EightHundredNinetyMountainRoadofficePropertyMember_lbl" xml:lang="en-US">Eight Hundred Ninety Mountain Roadoffice Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_EightHundredNinetyMountainRoadofficePropertyMember_lbl" xml:lang="en-US">890 Mountain Road [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneTwentyFiveBroadStreetOfficePropertyMember" xlink:label="cli_OneTwentyFiveBroadStreetOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneTwentyFiveBroadStreetOfficePropertyMember" xlink:to="cli_OneTwentyFiveBroadStreetOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneTwentyFiveBroadStreetOfficePropertyMember_lbl" xml:lang="en-US">One Twenty Five Broad Street Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneTwentyFiveBroadStreetOfficePropertyMember_lbl" xml:lang="en-US">One Twenty Five Broad Street Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneTwentyFiveBroadStreetOfficePropertyMember_lbl" xml:lang="en-US">125 Broad Street [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FourHundredRellaBoulevardOfficePropertyMember" xlink:label="cli_FourHundredRellaBoulevardOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FourHundredRellaBoulevardOfficePropertyMember" xlink:to="cli_FourHundredRellaBoulevardOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FourHundredRellaBoulevardOfficePropertyMember_lbl" xml:lang="en-US">Four Hundred Rella Boulevard Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FourHundredRellaBoulevardOfficePropertyMember_lbl" xml:lang="en-US">Four Hundred Rella Boulevard Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FourHundredRellaBoulevardOfficePropertyMember_lbl" xml:lang="en-US">400 Rella Boulevard [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ElevenClearbrookRoadOfficeOrFlexPropertyMember" xlink:label="cli_ElevenClearbrookRoadOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ElevenClearbrookRoadOfficeOrFlexPropertyMember" xlink:to="cli_ElevenClearbrookRoadOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ElevenClearbrookRoadOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Eleven Clearbrook Road Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ElevenClearbrookRoadOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Eleven Clearbrook Road Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ElevenClearbrookRoadOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">11 Clearbrook Road [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_SeventyFiveClearbrookRoadOfficeOrFlexPropertyMember" xlink:label="cli_SeventyFiveClearbrookRoadOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_SeventyFiveClearbrookRoadOfficeOrFlexPropertyMember" xlink:to="cli_SeventyFiveClearbrookRoadOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_SeventyFiveClearbrookRoadOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Seventy Five Clearbrook Road Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_SeventyFiveClearbrookRoadOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Seventy Five Clearbrook Road Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_SeventyFiveClearbrookRoadOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">75 Clearbrook Road [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneHundredClearbrookRoadOfficePropertyMember" xlink:label="cli_OneHundredClearbrookRoadOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneHundredClearbrookRoadOfficePropertyMember" xlink:to="cli_OneHundredClearbrookRoadOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneHundredClearbrookRoadOfficePropertyMember_lbl" xml:lang="en-US">One Hundred Clearbrook Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneHundredClearbrookRoadOfficePropertyMember_lbl" xml:lang="en-US">One Hundred Clearbrook Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneHundredClearbrookRoadOfficePropertyMember_lbl" xml:lang="en-US">100 Clearbrook Road [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneTwentyFiveClearbrookRoadOfficeOrFlexPropertyMember" xlink:label="cli_OneTwentyFiveClearbrookRoadOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneTwentyFiveClearbrookRoadOfficeOrFlexPropertyMember" xlink:to="cli_OneTwentyFiveClearbrookRoadOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneTwentyFiveClearbrookRoadOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Twenty Five Clearbrook Road Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneTwentyFiveClearbrookRoadOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Twenty Five Clearbrook Road Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneTwentyFiveClearbrookRoadOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">125 Clearbrook Road [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneHundredFiftyClearbrookRoadOfficeOrFlexPropertyMember" xlink:label="cli_OneHundredFiftyClearbrookRoadOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneHundredFiftyClearbrookRoadOfficeOrFlexPropertyMember" xlink:to="cli_OneHundredFiftyClearbrookRoadOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneHundredFiftyClearbrookRoadOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Hundred Fifty Clearbrook Road Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneHundredFiftyClearbrookRoadOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Hundred Fifty Clearbrook Road Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneHundredFiftyClearbrookRoadOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">150 Clearbrook Road [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneHundredSeventyFiveClearbrookRoadOfficeOrFlexPropertyMember" xlink:label="cli_OneHundredSeventyFiveClearbrookRoadOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneHundredSeventyFiveClearbrookRoadOfficeOrFlexPropertyMember" xlink:to="cli_OneHundredSeventyFiveClearbrookRoadOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneHundredSeventyFiveClearbrookRoadOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Hundred Seventy Five Clearbrook Road Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneHundredSeventyFiveClearbrookRoadOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Hundred Seventy Five Clearbrook Road Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneHundredSeventyFiveClearbrookRoadOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">175 Clearbrook Road [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwoHundredClearbrookRoadOfficeOrFlexPropertyMember" xlink:label="cli_TwoHundredClearbrookRoadOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwoHundredClearbrookRoadOfficeOrFlexPropertyMember" xlink:to="cli_TwoHundredClearbrookRoadOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwoHundredClearbrookRoadOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Two Hundred Clearbrook Road Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwoHundredClearbrookRoadOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Two Hundred Clearbrook Road Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwoHundredClearbrookRoadOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">200 Clearbrook Road [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwoHundredFiftyClearbrookRoadOfficeOrFlexPropertyMember" xlink:label="cli_TwoHundredFiftyClearbrookRoadOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwoHundredFiftyClearbrookRoadOfficeOrFlexPropertyMember" xlink:to="cli_TwoHundredFiftyClearbrookRoadOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwoHundredFiftyClearbrookRoadOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Two Hundred Fifty Clearbrook Road Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwoHundredFiftyClearbrookRoadOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Two Hundred Fifty Clearbrook Road Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwoHundredFiftyClearbrookRoadOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">250 Clearbrook Road [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FiftyExecutiveBoulevardOfficeOrFlexPropertyMember" xlink:label="cli_FiftyExecutiveBoulevardOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FiftyExecutiveBoulevardOfficeOrFlexPropertyMember" xlink:to="cli_FiftyExecutiveBoulevardOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FiftyExecutiveBoulevardOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Fifty Executive Boulevard Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FiftyExecutiveBoulevardOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Fifty Executive Boulevard Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FiftyExecutiveBoulevardOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">50 Executive Boulevard [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_SeventySevenExecutiveBoulevardOfficeOrFlexPropertyMember" xlink:label="cli_SeventySevenExecutiveBoulevardOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_SeventySevenExecutiveBoulevardOfficeOrFlexPropertyMember" xlink:to="cli_SeventySevenExecutiveBoulevardOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_SeventySevenExecutiveBoulevardOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Seventy Seven Executive Boulevard Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_SeventySevenExecutiveBoulevardOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Seventy Seven Executive Boulevard Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_SeventySevenExecutiveBoulevardOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">77 Executive Boulevard [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_EightyFiveExecutiveBoulevardOfficeOrFlexPropertyMember" xlink:label="cli_EightyFiveExecutiveBoulevardOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_EightyFiveExecutiveBoulevardOfficeOrFlexPropertyMember" xlink:to="cli_EightyFiveExecutiveBoulevardOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_EightyFiveExecutiveBoulevardOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Eighty Five Executive Boulevard Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_EightyFiveExecutiveBoulevardOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Eighty Five Executive Boulevard Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_EightyFiveExecutiveBoulevardOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">85 Executive Boulevard [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneHundredOneExecutiveBoulevardOfficePropertyMember" xlink:label="cli_OneHundredOneExecutiveBoulevardOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneHundredOneExecutiveBoulevardOfficePropertyMember" xlink:to="cli_OneHundredOneExecutiveBoulevardOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneHundredOneExecutiveBoulevardOfficePropertyMember_lbl" xml:lang="en-US">One Hundred One Executive Boulevard Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneHundredOneExecutiveBoulevardOfficePropertyMember_lbl" xml:lang="en-US">One Hundred One Executive Boulevard Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneHundredOneExecutiveBoulevardOfficePropertyMember_lbl" xml:lang="en-US">101 Executive Boulevard [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ThreeHundredExecutiveBoulevardOfficeOrFlexPropertyMember" xlink:label="cli_ThreeHundredExecutiveBoulevardOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ThreeHundredExecutiveBoulevardOfficeOrFlexPropertyMember" xlink:to="cli_ThreeHundredExecutiveBoulevardOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ThreeHundredExecutiveBoulevardOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Three Hundred Executive Boulevard Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ThreeHundredExecutiveBoulevardOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Three Hundred Executive Boulevard Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ThreeHundredExecutiveBoulevardOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">300 Executive Boulevard [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ThreeHundredFiftyExecutiveBoulevardOfficeOrFlexPropertyMember" xlink:label="cli_ThreeHundredFiftyExecutiveBoulevardOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ThreeHundredFiftyExecutiveBoulevardOfficeOrFlexPropertyMember" xlink:to="cli_ThreeHundredFiftyExecutiveBoulevardOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ThreeHundredFiftyExecutiveBoulevardOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Three Hundred Fifty Executive Boulevard Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ThreeHundredFiftyExecutiveBoulevardOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Three Hundred Fifty Executive Boulevard Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ThreeHundredFiftyExecutiveBoulevardOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">350 Executive Boulevard [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ThreeHundredNinetyNineExecutiveBoulevardOfficeOrFlexPropertyMember" xlink:label="cli_ThreeHundredNinetyNineExecutiveBoulevardOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ThreeHundredNinetyNineExecutiveBoulevardOfficeOrFlexPropertyMember" xlink:to="cli_ThreeHundredNinetyNineExecutiveBoulevardOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ThreeHundredNinetyNineExecutiveBoulevardOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Three Hundred Ninety Nine Executive Boulevard Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ThreeHundredNinetyNineExecutiveBoulevardOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Three Hundred Ninety Nine Executive Boulevard Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ThreeHundredNinetyNineExecutiveBoulevardOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">399 Executive Boulevard [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FourHundredExecutiveBoulevardOfficeOrFlexPropertyMember" xlink:label="cli_FourHundredExecutiveBoulevardOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FourHundredExecutiveBoulevardOfficeOrFlexPropertyMember" xlink:to="cli_FourHundredExecutiveBoulevardOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FourHundredExecutiveBoulevardOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Four Hundred Executive Boulevard Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FourHundredExecutiveBoulevardOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Four Hundred Executive Boulevard Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FourHundredExecutiveBoulevardOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">400 Executive Boulevard [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FiveHundredExecutiveBoulevardOfficeOrFlexPropertyMember" xlink:label="cli_FiveHundredExecutiveBoulevardOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FiveHundredExecutiveBoulevardOfficeOrFlexPropertyMember" xlink:to="cli_FiveHundredExecutiveBoulevardOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FiveHundredExecutiveBoulevardOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Five Hundred Executive Boulevard Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FiveHundredExecutiveBoulevardOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Five Hundred Executive Boulevard Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FiveHundredExecutiveBoulevardOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">500 Executive Boulevard [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FiveHundredTwentyFiveExecutiveBoulevardOfficeOrFlexPropertyMember" xlink:label="cli_FiveHundredTwentyFiveExecutiveBoulevardOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FiveHundredTwentyFiveExecutiveBoulevardOfficeOrFlexPropertyMember" xlink:to="cli_FiveHundredTwentyFiveExecutiveBoulevardOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FiveHundredTwentyFiveExecutiveBoulevardOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Five Hundred Twenty Five Executive Boulevard Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FiveHundredTwentyFiveExecutiveBoulevardOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Five Hundred Twenty Five Executive Boulevard Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FiveHundredTwentyFiveExecutiveBoulevardOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">525 Executive Boulevard [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_SevenHundredExecutiveBoulevardLandLeaseMember" xlink:label="cli_SevenHundredExecutiveBoulevardLandLeaseMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_SevenHundredExecutiveBoulevardLandLeaseMember" xlink:to="cli_SevenHundredExecutiveBoulevardLandLeaseMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_SevenHundredExecutiveBoulevardLandLeaseMember_lbl" xml:lang="en-US">Seven Hundred Executive Boulevard Land Lease [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_SevenHundredExecutiveBoulevardLandLeaseMember_lbl" xml:lang="en-US">Seven Hundred Executive Boulevard Land Lease [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_SevenHundredExecutiveBoulevardLandLeaseMember_lbl" xml:lang="en-US">700 Executive Boulevard [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FiveHundredFiftyFiveTaxterRoadOfficePropertyMember" xlink:label="cli_FiveHundredFiftyFiveTaxterRoadOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FiveHundredFiftyFiveTaxterRoadOfficePropertyMember" xlink:to="cli_FiveHundredFiftyFiveTaxterRoadOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FiveHundredFiftyFiveTaxterRoadOfficePropertyMember_lbl" xml:lang="en-US">Five Hundred Fifty Five Taxter Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FiveHundredFiftyFiveTaxterRoadOfficePropertyMember_lbl" xml:lang="en-US">Five Hundred Fifty Five Taxter Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FiveHundredFiftyFiveTaxterRoadOfficePropertyMember_lbl" xml:lang="en-US">555 Taxter Road [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FiveHundredSixtyFiveTaxterRoadOfficePropertyMember" xlink:label="cli_FiveHundredSixtyFiveTaxterRoadOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FiveHundredSixtyFiveTaxterRoadOfficePropertyMember" xlink:to="cli_FiveHundredSixtyFiveTaxterRoadOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FiveHundredSixtyFiveTaxterRoadOfficePropertyMember_lbl" xml:lang="en-US">Five Hundred Sixty Five Taxter Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FiveHundredSixtyFiveTaxterRoadOfficePropertyMember_lbl" xml:lang="en-US">Five Hundred Sixty Five Taxter Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FiveHundredSixtyFiveTaxterRoadOfficePropertyMember_lbl" xml:lang="en-US">565 Taxter Road [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FiveHundredSeventyTaxterRoadOfficePropertyMember" xlink:label="cli_FiveHundredSeventyTaxterRoadOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FiveHundredSeventyTaxterRoadOfficePropertyMember" xlink:to="cli_FiveHundredSeventyTaxterRoadOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FiveHundredSeventyTaxterRoadOfficePropertyMember_lbl" xml:lang="en-US">Five Hundred Seventy Taxter Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FiveHundredSeventyTaxterRoadOfficePropertyMember_lbl" xml:lang="en-US">Five Hundred Seventy Taxter Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FiveHundredSeventyTaxterRoadOfficePropertyMember_lbl" xml:lang="en-US">570 Taxter Road [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneWarehouseLaneIndustrialOrWarehousePropertyMember" xlink:label="cli_OneWarehouseLaneIndustrialOrWarehousePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneWarehouseLaneIndustrialOrWarehousePropertyMember" xlink:to="cli_OneWarehouseLaneIndustrialOrWarehousePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneWarehouseLaneIndustrialOrWarehousePropertyMember_lbl" xml:lang="en-US">One Warehouse Lane Industrial Or Warehouse Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneWarehouseLaneIndustrialOrWarehousePropertyMember_lbl" xml:lang="en-US">One Warehouse Lane Industrial Or Warehouse Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneWarehouseLaneIndustrialOrWarehousePropertyMember_lbl" xml:lang="en-US">1 Warehouse Lane [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwoWarehouseLaneIndustrialOrWarehousePropertyMember" xlink:label="cli_TwoWarehouseLaneIndustrialOrWarehousePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwoWarehouseLaneIndustrialOrWarehousePropertyMember" xlink:to="cli_TwoWarehouseLaneIndustrialOrWarehousePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwoWarehouseLaneIndustrialOrWarehousePropertyMember_lbl" xml:lang="en-US">Two Warehouse Lane Industrial Or Warehouse Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwoWarehouseLaneIndustrialOrWarehousePropertyMember_lbl" xml:lang="en-US">Two Warehouse Lane Industrial Or Warehouse Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwoWarehouseLaneIndustrialOrWarehousePropertyMember_lbl" xml:lang="en-US">2 Warehouse Lane [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ThreeWarehouseLaneIndustrialOrWarehousePropertyMember" xlink:label="cli_ThreeWarehouseLaneIndustrialOrWarehousePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ThreeWarehouseLaneIndustrialOrWarehousePropertyMember" xlink:to="cli_ThreeWarehouseLaneIndustrialOrWarehousePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ThreeWarehouseLaneIndustrialOrWarehousePropertyMember_lbl" xml:lang="en-US">Three Warehouse Lane Industrial Or Warehouse Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ThreeWarehouseLaneIndustrialOrWarehousePropertyMember_lbl" xml:lang="en-US">Three Warehouse Lane Industrial Or Warehouse Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ThreeWarehouseLaneIndustrialOrWarehousePropertyMember_lbl" xml:lang="en-US">3 Warehouse Lane [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FourWarehouseLaneIndustrialOrWarehousePropertyMember" xlink:label="cli_FourWarehouseLaneIndustrialOrWarehousePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FourWarehouseLaneIndustrialOrWarehousePropertyMember" xlink:to="cli_FourWarehouseLaneIndustrialOrWarehousePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FourWarehouseLaneIndustrialOrWarehousePropertyMember_lbl" xml:lang="en-US">Four Warehouse Lane Industrial Or Warehouse Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FourWarehouseLaneIndustrialOrWarehousePropertyMember_lbl" xml:lang="en-US">Four Warehouse Lane Industrial Or Warehouse Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FourWarehouseLaneIndustrialOrWarehousePropertyMember_lbl" xml:lang="en-US">4 Warehouse Lane [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FiveWarehouseLaneIndustrialOrWarehousePropertyMember" xlink:label="cli_FiveWarehouseLaneIndustrialOrWarehousePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FiveWarehouseLaneIndustrialOrWarehousePropertyMember" xlink:to="cli_FiveWarehouseLaneIndustrialOrWarehousePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FiveWarehouseLaneIndustrialOrWarehousePropertyMember_lbl" xml:lang="en-US">Five Warehouse Lane Industrial Or Warehouse Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FiveWarehouseLaneIndustrialOrWarehousePropertyMember_lbl" xml:lang="en-US">Five Warehouse Lane Industrial Or Warehouse Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FiveWarehouseLaneIndustrialOrWarehousePropertyMember_lbl" xml:lang="en-US">5 Warehouse Lane [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_SixWarehouseLaneIndustrialOrWarehousePropertyMember" xlink:label="cli_SixWarehouseLaneIndustrialOrWarehousePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_SixWarehouseLaneIndustrialOrWarehousePropertyMember" xlink:to="cli_SixWarehouseLaneIndustrialOrWarehousePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_SixWarehouseLaneIndustrialOrWarehousePropertyMember_lbl" xml:lang="en-US">Six Warehouse Lane Industrial Or Warehouse Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_SixWarehouseLaneIndustrialOrWarehousePropertyMember_lbl" xml:lang="en-US">Six Warehouse Lane Industrial Or Warehouse Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_SixWarehouseLaneIndustrialOrWarehousePropertyMember_lbl" xml:lang="en-US">6 Warehouse Lane [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneWestchesterPlazaOfficeOrFlexPropertyMember" xlink:label="cli_OneWestchesterPlazaOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneWestchesterPlazaOfficeOrFlexPropertyMember" xlink:to="cli_OneWestchesterPlazaOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneWestchesterPlazaOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Westchester Plaza Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneWestchesterPlazaOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Westchester Plaza Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneWestchesterPlazaOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">1 Westchester Plaza [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwoWestchesterPlazaOfficeOrFlexPropertyMember" xlink:label="cli_TwoWestchesterPlazaOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwoWestchesterPlazaOfficeOrFlexPropertyMember" xlink:to="cli_TwoWestchesterPlazaOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwoWestchesterPlazaOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Two Westchester Plaza Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwoWestchesterPlazaOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Two Westchester Plaza Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwoWestchesterPlazaOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">2 Westchester Plaza [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ThreeWestchesterPlazaOfficeOrFlexPropertyMember" xlink:label="cli_ThreeWestchesterPlazaOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ThreeWestchesterPlazaOfficeOrFlexPropertyMember" xlink:to="cli_ThreeWestchesterPlazaOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ThreeWestchesterPlazaOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Three Westchester Plaza Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ThreeWestchesterPlazaOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Three Westchester Plaza Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ThreeWestchesterPlazaOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">3 Westchester Plaza [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FourWestchesterPlazaOfficeOrFlexPropertyMember" xlink:label="cli_FourWestchesterPlazaOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FourWestchesterPlazaOfficeOrFlexPropertyMember" xlink:to="cli_FourWestchesterPlazaOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FourWestchesterPlazaOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Four Westchester Plaza Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FourWestchesterPlazaOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Four Westchester Plaza Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FourWestchesterPlazaOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">4 Westchester Plaza [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FiveWestchesterPlazaOfficeOrFlexPropertyMember" xlink:label="cli_FiveWestchesterPlazaOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FiveWestchesterPlazaOfficeOrFlexPropertyMember" xlink:to="cli_FiveWestchesterPlazaOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FiveWestchesterPlazaOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Five Westchester Plaza Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FiveWestchesterPlazaOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Five Westchester Plaza Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FiveWestchesterPlazaOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">5 Westchester Plaza [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_SixWestchesterPlazaOfficeOrFlexPropertyMember" xlink:label="cli_SixWestchesterPlazaOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_SixWestchesterPlazaOfficeOrFlexPropertyMember" xlink:to="cli_SixWestchesterPlazaOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_SixWestchesterPlazaOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Six Westchester Plaza Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_SixWestchesterPlazaOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Six Westchester Plaza Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_SixWestchesterPlazaOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">6 Westchester Plaza [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_SevenWestchesterPlazaOfficeOrFlexPropertyMember" xlink:label="cli_SevenWestchesterPlazaOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_SevenWestchesterPlazaOfficeOrFlexPropertyMember" xlink:to="cli_SevenWestchesterPlazaOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_SevenWestchesterPlazaOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Seven Westchester Plaza Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_SevenWestchesterPlazaOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Seven Westchester Plaza Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_SevenWestchesterPlazaOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">7 Westchester Plaza [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_EightWestchesterPlazaOfficeOrFlexPropertyMember" xlink:label="cli_EightWestchesterPlazaOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_EightWestchesterPlazaOfficeOrFlexPropertyMember" xlink:to="cli_EightWestchesterPlazaOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_EightWestchesterPlazaOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Eight Westchester Plaza Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_EightWestchesterPlazaOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Eight Westchester Plaza Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_EightWestchesterPlazaOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">8 Westchester Plaza [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwoHundredSawMillRiverRoadOfficeOrFlexPropertyMember" xlink:label="cli_TwoHundredSawMillRiverRoadOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwoHundredSawMillRiverRoadOfficeOrFlexPropertyMember" xlink:to="cli_TwoHundredSawMillRiverRoadOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwoHundredSawMillRiverRoadOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Two Hundred Saw Mill River Road Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwoHundredSawMillRiverRoadOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Two Hundred Saw Mill River Road Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwoHundredSawMillRiverRoadOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">200 Saw Mill River Road [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneSkylineDriveOfficePropertyMember" xlink:label="cli_OneSkylineDriveOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneSkylineDriveOfficePropertyMember" xlink:to="cli_OneSkylineDriveOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneSkylineDriveOfficePropertyMember_lbl" xml:lang="en-US">One Skyline Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneSkylineDriveOfficePropertyMember_lbl" xml:lang="en-US">One Skyline Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneSkylineDriveOfficePropertyMember_lbl" xml:lang="en-US">1 Skyline Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwoSkylineDriveOfficePropertyMember" xlink:label="cli_TwoSkylineDriveOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwoSkylineDriveOfficePropertyMember" xlink:to="cli_TwoSkylineDriveOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwoSkylineDriveOfficePropertyMember_lbl" xml:lang="en-US">Two Skyline Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwoSkylineDriveOfficePropertyMember_lbl" xml:lang="en-US">Two Skyline Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwoSkylineDriveOfficePropertyMember_lbl" xml:lang="en-US">2 Skyline Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FourSkylineDriveOfficeOrFlexPropertyMember" xlink:label="cli_FourSkylineDriveOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FourSkylineDriveOfficeOrFlexPropertyMember" xlink:to="cli_FourSkylineDriveOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FourSkylineDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Four Skyline Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FourSkylineDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Four Skyline Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FourSkylineDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">4 Skyline Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FiveSkylineDriveOfficeOrFlexPropertyMember" xlink:label="cli_FiveSkylineDriveOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FiveSkylineDriveOfficeOrFlexPropertyMember" xlink:to="cli_FiveSkylineDriveOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FiveSkylineDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Five Skyline Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FiveSkylineDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Five Skyline Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FiveSkylineDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">5 Skyline Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_SixSkylineDriveOfficeOrFlexPropertyMember" xlink:label="cli_SixSkylineDriveOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_SixSkylineDriveOfficeOrFlexPropertyMember" xlink:to="cli_SixSkylineDriveOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_SixSkylineDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Six Skyline Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_SixSkylineDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Six Skyline Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_SixSkylineDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">6 Skyline Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_SevenSkylineDriveOfficePropertyMember" xlink:label="cli_SevenSkylineDriveOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_SevenSkylineDriveOfficePropertyMember" xlink:to="cli_SevenSkylineDriveOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_SevenSkylineDriveOfficePropertyMember_lbl" xml:lang="en-US">Seven Skyline Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_SevenSkylineDriveOfficePropertyMember_lbl" xml:lang="en-US">Seven Skyline Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_SevenSkylineDriveOfficePropertyMember_lbl" xml:lang="en-US">7 Skyline Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_EightSkylineDriveOfficeOrFlexPropertyMember" xlink:label="cli_EightSkylineDriveOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_EightSkylineDriveOfficeOrFlexPropertyMember" xlink:to="cli_EightSkylineDriveOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_EightSkylineDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Eight Skyline Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_EightSkylineDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Eight Skyline Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_EightSkylineDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">8 Skyline Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TenSkylineDriveOfficeOrFlexPropertyMember" xlink:label="cli_TenSkylineDriveOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TenSkylineDriveOfficeOrFlexPropertyMember" xlink:to="cli_TenSkylineDriveOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TenSkylineDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Ten Skyline Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TenSkylineDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Ten Skyline Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TenSkylineDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">10 Skyline Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ElevenSkylineDriveOfficeOrFlexPropertyMember" xlink:label="cli_ElevenSkylineDriveOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ElevenSkylineDriveOfficeOrFlexPropertyMember" xlink:to="cli_ElevenSkylineDriveOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ElevenSkylineDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Eleven Skyline Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ElevenSkylineDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Eleven Skyline Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ElevenSkylineDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">11 Skyline Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwelveSkylineDriveOfficeOrFlexPropertyMember" xlink:label="cli_TwelveSkylineDriveOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwelveSkylineDriveOfficeOrFlexPropertyMember" xlink:to="cli_TwelveSkylineDriveOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwelveSkylineDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Twelve Skyline Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwelveSkylineDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Twelve Skyline Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwelveSkylineDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">12 Skyline Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FifteenSkylineDriveOfficeOrFlexPropertyMember" xlink:label="cli_FifteenSkylineDriveOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FifteenSkylineDriveOfficeOrFlexPropertyMember" xlink:to="cli_FifteenSkylineDriveOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FifteenSkylineDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Fifteen Skyline Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FifteenSkylineDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Fifteen Skyline Drive Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FifteenSkylineDriveOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">15 Skyline Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_SeventeenSkylineDriveOfficePropertyMember" xlink:label="cli_SeventeenSkylineDriveOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_SeventeenSkylineDriveOfficePropertyMember" xlink:to="cli_SeventeenSkylineDriveOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_SeventeenSkylineDriveOfficePropertyMember_lbl" xml:lang="en-US">Seventeen Skyline Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_SeventeenSkylineDriveOfficePropertyMember_lbl" xml:lang="en-US">Seventeen Skyline Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_SeventeenSkylineDriveOfficePropertyMember_lbl" xml:lang="en-US">17 Skyline Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_NinteenSkylineDriveOfficePropertyMember" xlink:label="cli_NinteenSkylineDriveOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_NinteenSkylineDriveOfficePropertyMember" xlink:to="cli_NinteenSkylineDriveOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_NinteenSkylineDriveOfficePropertyMember_lbl" xml:lang="en-US">Ninteen Skyline Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_NinteenSkylineDriveOfficePropertyMember_lbl" xml:lang="en-US">Ninteen Skyline Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_NinteenSkylineDriveOfficePropertyMember_lbl" xml:lang="en-US">19 Skyline Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwoHundredWhitePlainsRoadOfficePropertyMember" xlink:label="cli_TwoHundredWhitePlainsRoadOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwoHundredWhitePlainsRoadOfficePropertyMember" xlink:to="cli_TwoHundredWhitePlainsRoadOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwoHundredWhitePlainsRoadOfficePropertyMember_lbl" xml:lang="en-US">Two Hundred White Plains Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwoHundredWhitePlainsRoadOfficePropertyMember_lbl" xml:lang="en-US">Two Hundred White Plains Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwoHundredWhitePlainsRoadOfficePropertyMember_lbl" xml:lang="en-US">200 White Plains Road [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwoHundredTwentyWhitePlainsRoadOfficePropertyMember" xlink:label="cli_TwoHundredTwentyWhitePlainsRoadOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwoHundredTwentyWhitePlainsRoadOfficePropertyMember" xlink:to="cli_TwoHundredTwentyWhitePlainsRoadOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwoHundredTwentyWhitePlainsRoadOfficePropertyMember_lbl" xml:lang="en-US">Two Hundred Twenty White Plains Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwoHundredTwentyWhitePlainsRoadOfficePropertyMember_lbl" xml:lang="en-US">Two Hundred Twenty White Plains Road Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwoHundredTwentyWhitePlainsRoadOfficePropertyMember_lbl" xml:lang="en-US">220 White Plains Road [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwoHundredThirtyWhitePlainsRoadStandAloneRetailPropertyMember" xlink:label="cli_TwoHundredThirtyWhitePlainsRoadStandAloneRetailPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwoHundredThirtyWhitePlainsRoadStandAloneRetailPropertyMember" xlink:to="cli_TwoHundredThirtyWhitePlainsRoadStandAloneRetailPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwoHundredThirtyWhitePlainsRoadStandAloneRetailPropertyMember_lbl" xml:lang="en-US">Two Hundred Thirty White Plains Road Stand Alone Retail Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwoHundredThirtyWhitePlainsRoadStandAloneRetailPropertyMember_lbl" xml:lang="en-US">Two Hundred Thirty White Plains Road Stand Alone Retail Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwoHundredThirtyWhitePlainsRoadStandAloneRetailPropertyMember_lbl" xml:lang="en-US">230 White Plains Road [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneBarkerAvenueOfficePropertyMember" xlink:label="cli_OneBarkerAvenueOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneBarkerAvenueOfficePropertyMember" xlink:to="cli_OneBarkerAvenueOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneBarkerAvenueOfficePropertyMember_lbl" xml:lang="en-US">One Barker Avenue Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneBarkerAvenueOfficePropertyMember_lbl" xml:lang="en-US">One Barker Avenue Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneBarkerAvenueOfficePropertyMember_lbl" xml:lang="en-US">1 Barker Avenue [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ThreeBarkerAvenueOfficePropertyMember" xlink:label="cli_ThreeBarkerAvenueOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ThreeBarkerAvenueOfficePropertyMember" xlink:to="cli_ThreeBarkerAvenueOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ThreeBarkerAvenueOfficePropertyMember_lbl" xml:lang="en-US">Three Barker Avenue Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ThreeBarkerAvenueOfficePropertyMember_lbl" xml:lang="en-US">Three Barker Avenue Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ThreeBarkerAvenueOfficePropertyMember_lbl" xml:lang="en-US">3 Barker Avenue [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FiftyMainStreetOfficePropertyMember" xlink:label="cli_FiftyMainStreetOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FiftyMainStreetOfficePropertyMember" xlink:to="cli_FiftyMainStreetOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FiftyMainStreetOfficePropertyMember_lbl" xml:lang="en-US">Fifty Main Street Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FiftyMainStreetOfficePropertyMember_lbl" xml:lang="en-US">Fifty Main Street Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FiftyMainStreetOfficePropertyMember_lbl" xml:lang="en-US">50 Main Street [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ElevenMartineAvenueOfficePropertyMember" xlink:label="cli_ElevenMartineAvenueOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ElevenMartineAvenueOfficePropertyMember" xlink:to="cli_ElevenMartineAvenueOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ElevenMartineAvenueOfficePropertyMember_lbl" xml:lang="en-US">Eleven Martine Avenue Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ElevenMartineAvenueOfficePropertyMember_lbl" xml:lang="en-US">Eleven Martine Avenue Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ElevenMartineAvenueOfficePropertyMember_lbl" xml:lang="en-US">11 Martine Avenue [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneWaterStreetOfficePropertyMember" xlink:label="cli_OneWaterStreetOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneWaterStreetOfficePropertyMember" xlink:to="cli_OneWaterStreetOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneWaterStreetOfficePropertyMember_lbl" xml:lang="en-US">One Water Street Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneWaterStreetOfficePropertyMember_lbl" xml:lang="en-US">One Water Street Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneWaterStreetOfficePropertyMember_lbl" xml:lang="en-US">1 Water Street [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneHundredCorporateBoulevardOfficeOrFlexPropertyMember" xlink:label="cli_OneHundredCorporateBoulevardOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneHundredCorporateBoulevardOfficeOrFlexPropertyMember" xlink:to="cli_OneHundredCorporateBoulevardOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneHundredCorporateBoulevardOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Hundred Corporate Boulevard Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneHundredCorporateBoulevardOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Hundred Corporate Boulevard Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneHundredCorporateBoulevardOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">100 Corporate Boulevard [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwoHundredCorporateBoulevardSouthOfficeOrFlexPropertyMember" xlink:label="cli_TwoHundredCorporateBoulevardSouthOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwoHundredCorporateBoulevardSouthOfficeOrFlexPropertyMember" xlink:to="cli_TwoHundredCorporateBoulevardSouthOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwoHundredCorporateBoulevardSouthOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Two Hundred Corporate Boulevard South Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwoHundredCorporateBoulevardSouthOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Two Hundred Corporate Boulevard South Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwoHundredCorporateBoulevardSouthOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">200 Corporate Boulevard South [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneEnterpriseBoulevardLandLeaseMember" xlink:label="cli_OneEnterpriseBoulevardLandLeaseMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneEnterpriseBoulevardLandLeaseMember" xlink:to="cli_OneEnterpriseBoulevardLandLeaseMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneEnterpriseBoulevardLandLeaseMember_lbl" xml:lang="en-US">One Enterprise Boulevard Land Lease [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneEnterpriseBoulevardLandLeaseMember_lbl" xml:lang="en-US">One Enterprise Boulevard Land Lease [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneEnterpriseBoulevardLandLeaseMember_lbl" xml:lang="en-US">1 Enterprise Boulevard [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneExecutiveBoulevardOfficePropertyMember" xlink:label="cli_OneExecutiveBoulevardOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneExecutiveBoulevardOfficePropertyMember" xlink:to="cli_OneExecutiveBoulevardOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneExecutiveBoulevardOfficePropertyMember_lbl" xml:lang="en-US">One Executive Boulevard Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneExecutiveBoulevardOfficePropertyMember_lbl" xml:lang="en-US">One Executive Boulevard Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneExecutiveBoulevardOfficePropertyMember_lbl" xml:lang="en-US">1 Executive Boulevard [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwoExecutiveBoulevardStandAloneRetailPropertyMember" xlink:label="cli_TwoExecutiveBoulevardStandAloneRetailPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwoExecutiveBoulevardStandAloneRetailPropertyMember" xlink:to="cli_TwoExecutiveBoulevardStandAloneRetailPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwoExecutiveBoulevardStandAloneRetailPropertyMember_lbl" xml:lang="en-US">Two Executive Boulevard Stand Alone Retail Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwoExecutiveBoulevardStandAloneRetailPropertyMember_lbl" xml:lang="en-US">Two Executive Boulevard Stand Alone Retail Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwoExecutiveBoulevardStandAloneRetailPropertyMember_lbl" xml:lang="en-US">2 Executive Boulevard [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ThreeExecutiveBoulevardOfficePropertyMember" xlink:label="cli_ThreeExecutiveBoulevardOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ThreeExecutiveBoulevardOfficePropertyMember" xlink:to="cli_ThreeExecutiveBoulevardOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ThreeExecutiveBoulevardOfficePropertyMember_lbl" xml:lang="en-US">Three Executive Boulevard Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ThreeExecutiveBoulevardOfficePropertyMember_lbl" xml:lang="en-US">Three Executive Boulevard Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ThreeExecutiveBoulevardOfficePropertyMember_lbl" xml:lang="en-US">3 Executive Boulevard [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FourExecutivePlazaOfficeOrFlexPropertyMember" xlink:label="cli_FourExecutivePlazaOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FourExecutivePlazaOfficeOrFlexPropertyMember" xlink:to="cli_FourExecutivePlazaOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FourExecutivePlazaOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Four Executive Plaza Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FourExecutivePlazaOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Four Executive Plaza Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FourExecutivePlazaOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">4 Executive Plaza [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_SixExecutivePlazaOfficeOrFlexPropertyMember" xlink:label="cli_SixExecutivePlazaOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_SixExecutivePlazaOfficeOrFlexPropertyMember" xlink:to="cli_SixExecutivePlazaOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_SixExecutivePlazaOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Six Executive Plaza Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_SixExecutivePlazaOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Six Executive Plaza Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_SixExecutivePlazaOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">6 Executive Plaza [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneOdellPlazaOfficeOrFlexPropertyMember" xlink:label="cli_OneOdellPlazaOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneOdellPlazaOfficeOrFlexPropertyMember" xlink:to="cli_OneOdellPlazaOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneOdellPlazaOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Odell Plaza Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneOdellPlazaOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">One Odell Plaza Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneOdellPlazaOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">1 Odell Plaza [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ThreeOdellPlazaOfficePropertyMember" xlink:label="cli_ThreeOdellPlazaOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ThreeOdellPlazaOfficePropertyMember" xlink:to="cli_ThreeOdellPlazaOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ThreeOdellPlazaOfficePropertyMember_lbl" xml:lang="en-US">Three Odell Plaza Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ThreeOdellPlazaOfficePropertyMember_lbl" xml:lang="en-US">Three Odell Plaza Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ThreeOdellPlazaOfficePropertyMember_lbl" xml:lang="en-US">3 Odell Plaza [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FiveOdellPlazaOfficeOrFlexPropertyMember" xlink:label="cli_FiveOdellPlazaOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FiveOdellPlazaOfficeOrFlexPropertyMember" xlink:to="cli_FiveOdellPlazaOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FiveOdellPlazaOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Five Odell Plaza Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FiveOdellPlazaOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Five Odell Plaza Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FiveOdellPlazaOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">5 Odell Plaza [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_SevenOdellPlazaOfficeOrFlexPropertyMember" xlink:label="cli_SevenOdellPlazaOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_SevenOdellPlazaOfficeOrFlexPropertyMember" xlink:to="cli_SevenOdellPlazaOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_SevenOdellPlazaOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Seven Odell Plaza Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_SevenOdellPlazaOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Seven Odell Plaza Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_SevenOdellPlazaOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">7 Odell Plaza [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneThousandWestlakesDriveOfficePropertyMember" xlink:label="cli_OneThousandWestlakesDriveOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneThousandWestlakesDriveOfficePropertyMember" xlink:to="cli_OneThousandWestlakesDriveOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneThousandWestlakesDriveOfficePropertyMember_lbl" xml:lang="en-US">One Thousand Westlakes Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneThousandWestlakesDriveOfficePropertyMember_lbl" xml:lang="en-US">One Thousand Westlakes Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneThousandWestlakesDriveOfficePropertyMember_lbl" xml:lang="en-US">1000 Westlakes Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneThousandFiftyFiveWestlakesDriveOfficePropertyMember" xlink:label="cli_OneThousandFiftyFiveWestlakesDriveOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneThousandFiftyFiveWestlakesDriveOfficePropertyMember" xlink:to="cli_OneThousandFiftyFiveWestlakesDriveOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneThousandFiftyFiveWestlakesDriveOfficePropertyMember_lbl" xml:lang="en-US">One Thousand Fifty Five Westlakes Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneThousandFiftyFiveWestlakesDriveOfficePropertyMember_lbl" xml:lang="en-US">One Thousand Fifty Five Westlakes Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneThousandFiftyFiveWestlakesDriveOfficePropertyMember_lbl" xml:lang="en-US">1055 Westlakes Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneThousandTwoHundredFiveWestlakesDriveOfficePropertyMember" xlink:label="cli_OneThousandTwoHundredFiveWestlakesDriveOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneThousandTwoHundredFiveWestlakesDriveOfficePropertyMember" xlink:to="cli_OneThousandTwoHundredFiveWestlakesDriveOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneThousandTwoHundredFiveWestlakesDriveOfficePropertyMember_lbl" xml:lang="en-US">One Thousand Two Hundred Five Westlakes Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneThousandTwoHundredFiveWestlakesDriveOfficePropertyMember_lbl" xml:lang="en-US">One Thousand Two Hundred Five Westlakes Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneThousandTwoHundredFiveWestlakesDriveOfficePropertyMember_lbl" xml:lang="en-US">1205 Westlakes Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneThousandTwoHundredThirtyFiveWestlakesDriveOfficePropertyMember" xlink:label="cli_OneThousandTwoHundredThirtyFiveWestlakesDriveOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneThousandTwoHundredThirtyFiveWestlakesDriveOfficePropertyMember" xlink:to="cli_OneThousandTwoHundredThirtyFiveWestlakesDriveOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneThousandTwoHundredThirtyFiveWestlakesDriveOfficePropertyMember_lbl" xml:lang="en-US">One Thousand Two Hundred Thirty Five Westlakes Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneThousandTwoHundredThirtyFiveWestlakesDriveOfficePropertyMember_lbl" xml:lang="en-US">One Thousand Two Hundred Thirty Five Westlakes Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneThousandTwoHundredThirtyFiveWestlakesDriveOfficePropertyMember_lbl" xml:lang="en-US">1235 Westlakes Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_HundredStevensDriveOfficePropertyMember" xlink:label="cli_HundredStevensDriveOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_HundredStevensDriveOfficePropertyMember" xlink:to="cli_HundredStevensDriveOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_HundredStevensDriveOfficePropertyMember_lbl" xml:lang="en-US">Hundred Stevens Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_HundredStevensDriveOfficePropertyMember_lbl" xml:lang="en-US">Hundred Stevens Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_HundredStevensDriveOfficePropertyMember_lbl" xml:lang="en-US">100 Stevens Dr [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwoHundredStevensDriveOfficePropertyMember" xlink:label="cli_TwoHundredStevensDriveOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwoHundredStevensDriveOfficePropertyMember" xlink:to="cli_TwoHundredStevensDriveOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwoHundredStevensDriveOfficePropertyMember_lbl" xml:lang="en-US">Two Hundred Stevens Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwoHundredStevensDriveOfficePropertyMember_lbl" xml:lang="en-US">Two Hundred Stevens Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwoHundredStevensDriveOfficePropertyMember_lbl" xml:lang="en-US">200 Stevens Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_ThreeHundredStevensDriveOfficePropertyMember" xlink:label="cli_ThreeHundredStevensDriveOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_ThreeHundredStevensDriveOfficePropertyMember" xlink:to="cli_ThreeHundredStevensDriveOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_ThreeHundredStevensDriveOfficePropertyMember_lbl" xml:lang="en-US">Three Hundred Stevens Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_ThreeHundredStevensDriveOfficePropertyMember_lbl" xml:lang="en-US">Three Hundred Stevens Drive Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_ThreeHundredStevensDriveOfficePropertyMember_lbl" xml:lang="en-US">300 Stevens Drive [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneThousandFourHundredProvidenceRoadCenterOneOfficePropertyMember" xlink:label="cli_OneThousandFourHundredProvidenceRoadCenterOneOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneThousandFourHundredProvidenceRoadCenterOneOfficePropertyMember" xlink:to="cli_OneThousandFourHundredProvidenceRoadCenterOneOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneThousandFourHundredProvidenceRoadCenterOneOfficePropertyMember_lbl" xml:lang="en-US">One Thousand Four Hundred Providence Road Center One Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneThousandFourHundredProvidenceRoadCenterOneOfficePropertyMember_lbl" xml:lang="en-US">One Thousand Four Hundred Providence Road Center One Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneThousandFourHundredProvidenceRoadCenterOneOfficePropertyMember_lbl" xml:lang="en-US">1400 Providence Rd, Center I [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneThousandFourHundredProvidenceRoadCenterTwoOfficePropertyMember" xlink:label="cli_OneThousandFourHundredProvidenceRoadCenterTwoOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneThousandFourHundredProvidenceRoadCenterTwoOfficePropertyMember" xlink:to="cli_OneThousandFourHundredProvidenceRoadCenterTwoOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneThousandFourHundredProvidenceRoadCenterTwoOfficePropertyMember_lbl" xml:lang="en-US">One Thousand Four Hundred Providence Road Center Two Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneThousandFourHundredProvidenceRoadCenterTwoOfficePropertyMember_lbl" xml:lang="en-US">One Thousand Four Hundred Providence Road Center Two Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneThousandFourHundredProvidenceRoadCenterTwoOfficePropertyMember_lbl" xml:lang="en-US">1400 Providence Rd, Center II [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneHundredFiftyMonumentRoadOneOfficePropertyMember" xlink:label="cli_OneHundredFiftyMonumentRoadOneOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneHundredFiftyMonumentRoadOneOfficePropertyMember" xlink:to="cli_OneHundredFiftyMonumentRoadOneOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneHundredFiftyMonumentRoadOneOfficePropertyMember_lbl" xml:lang="en-US">One Hundred Fifty Monument Road One Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneHundredFiftyMonumentRoadOneOfficePropertyMember_lbl" xml:lang="en-US">One Hundred Fifty Monument Road One Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneHundredFiftyMonumentRoadOneOfficePropertyMember_lbl" xml:lang="en-US">150 Monument Road [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FourSentryParkOfficePropertyMember" xlink:label="cli_FourSentryParkOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FourSentryParkOfficePropertyMember" xlink:to="cli_FourSentryParkOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FourSentryParkOfficePropertyMember_lbl" xml:lang="en-US">Four Sentry Park Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FourSentryParkOfficePropertyMember_lbl" xml:lang="en-US">Four Sentry Park Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FourSentryParkOfficePropertyMember_lbl" xml:lang="en-US">4 Sentry Park [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FiveSentryParkEastOfficePropertyMember" xlink:label="cli_FiveSentryParkEastOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FiveSentryParkEastOfficePropertyMember" xlink:to="cli_FiveSentryParkEastOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FiveSentryParkEastOfficePropertyMember_lbl" xml:lang="en-US">Five Sentry Park East Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FiveSentryParkEastOfficePropertyMember_lbl" xml:lang="en-US">Five Sentry Park East Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FiveSentryParkEastOfficePropertyMember_lbl" xml:lang="en-US">5 Sentry Park East [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FiveSentryParkWestOfficePropertyMember" xlink:label="cli_FiveSentryParkWestOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FiveSentryParkWestOfficePropertyMember" xlink:to="cli_FiveSentryParkWestOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FiveSentryParkWestOfficePropertyMember_lbl" xml:lang="en-US">Five Sentry Park West Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FiveSentryParkWestOfficePropertyMember_lbl" xml:lang="en-US">Five Sentry Park West Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FiveSentryParkWestOfficePropertyMember_lbl" xml:lang="en-US">5 Sentry Park West [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_SixteenSentryParkWestOfficePropertyMember" xlink:label="cli_SixteenSentryParkWestOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_SixteenSentryParkWestOfficePropertyMember" xlink:to="cli_SixteenSentryParkWestOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_SixteenSentryParkWestOfficePropertyMember_lbl" xml:lang="en-US">Sixteen Sentry Park West Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_SixteenSentryParkWestOfficePropertyMember_lbl" xml:lang="en-US">Sixteen Sentry Park West Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_SixteenSentryParkWestOfficePropertyMember_lbl" xml:lang="en-US">16 Sentry Park West [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_EighteenSentryParkWestOfficePropertyMember" xlink:label="cli_EighteenSentryParkWestOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_EighteenSentryParkWestOfficePropertyMember" xlink:to="cli_EighteenSentryParkWestOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_EighteenSentryParkWestOfficePropertyMember_lbl" xml:lang="en-US">Eighteen Sentry Park West Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_EighteenSentryParkWestOfficePropertyMember_lbl" xml:lang="en-US">Eighteen Sentry Park West Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_EighteenSentryParkWestOfficePropertyMember_lbl" xml:lang="en-US">18 Sentry Park West [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_TwoThousandTwoHundredRenaissanceBlvdOfficePropertyMember" xlink:label="cli_TwoThousandTwoHundredRenaissanceBlvdOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_TwoThousandTwoHundredRenaissanceBlvdOfficePropertyMember" xlink:to="cli_TwoThousandTwoHundredRenaissanceBlvdOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_TwoThousandTwoHundredRenaissanceBlvdOfficePropertyMember_lbl" xml:lang="en-US">Two Thousand Two Hundred Renaissance Blvd Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_TwoThousandTwoHundredRenaissanceBlvdOfficePropertyMember_lbl" xml:lang="en-US">Two Thousand Two Hundred Renaissance Blvd Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_TwoThousandTwoHundredRenaissanceBlvdOfficePropertyMember_lbl" xml:lang="en-US">2200 Renaissance Blvd [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneThousandMadisonAvenueOfficePropertyMember" xlink:label="cli_OneThousandMadisonAvenueOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneThousandMadisonAvenueOfficePropertyMember" xlink:to="cli_OneThousandMadisonAvenueOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneThousandMadisonAvenueOfficePropertyMember_lbl" xml:lang="en-US">One Thousand Madison Avenue Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneThousandMadisonAvenueOfficePropertyMember_lbl" xml:lang="en-US">One Thousand Madison Avenue Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneThousandMadisonAvenueOfficePropertyMember_lbl" xml:lang="en-US">1000 Madison Avenue [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneThousandOneHudredFiftyPlymouthMeetingMallOfficePropertyMember" xlink:label="cli_OneThousandOneHudredFiftyPlymouthMeetingMallOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneThousandOneHudredFiftyPlymouthMeetingMallOfficePropertyMember" xlink:to="cli_OneThousandOneHudredFiftyPlymouthMeetingMallOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneThousandOneHudredFiftyPlymouthMeetingMallOfficePropertyMember_lbl" xml:lang="en-US">One Thousand One Hudred Fifty Plymouth Meeting Mall Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneThousandOneHudredFiftyPlymouthMeetingMallOfficePropertyMember_lbl" xml:lang="en-US">One Thousand One Hudred Fifty Plymouth Meeting Mall Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneThousandOneHudredFiftyPlymouthMeetingMallOfficePropertyMember_lbl" xml:lang="en-US">1150 Plymouth Meeting Mall [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FortyRichardsAvenueOfficePropertyMember" xlink:label="cli_FortyRichardsAvenueOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FortyRichardsAvenueOfficePropertyMember" xlink:to="cli_FortyRichardsAvenueOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FortyRichardsAvenueOfficePropertyMember_lbl" xml:lang="en-US">Forty Richards Avenue Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FortyRichardsAvenueOfficePropertyMember_lbl" xml:lang="en-US">Forty Richards Avenue Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FortyRichardsAvenueOfficePropertyMember_lbl" xml:lang="en-US">40 Richards Avenue [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneThousandTwoHundredSixtySixEastMainStreetOfficePropertyMember" xlink:label="cli_OneThousandTwoHundredSixtySixEastMainStreetOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneThousandTwoHundredSixtySixEastMainStreetOfficePropertyMember" xlink:to="cli_OneThousandTwoHundredSixtySixEastMainStreetOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneThousandTwoHundredSixtySixEastMainStreetOfficePropertyMember_lbl" xml:lang="en-US">One Thousand Two Hundred Sixty Six East Main Street Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneThousandTwoHundredSixtySixEastMainStreetOfficePropertyMember_lbl" xml:lang="en-US">One Thousand Two Hundred Sixty Six East Main Street Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneThousandTwoHundredSixtySixEastMainStreetOfficePropertyMember_lbl" xml:lang="en-US">1266 East Main Street [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FourHundredNineteenWestAvenueOfficeOrFlexPropertyMember" xlink:label="cli_FourHundredNineteenWestAvenueOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FourHundredNineteenWestAvenueOfficeOrFlexPropertyMember" xlink:to="cli_FourHundredNineteenWestAvenueOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FourHundredNineteenWestAvenueOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Four Hundred Nineteen West Avenue Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FourHundredNineteenWestAvenueOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Four Hundred Nineteen West Avenue Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FourHundredNineteenWestAvenueOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">419 West Avenue [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FiveHundredWestAvenueOfficeOrFlexPropertyMember" xlink:label="cli_FiveHundredWestAvenueOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FiveHundredWestAvenueOfficeOrFlexPropertyMember" xlink:to="cli_FiveHundredWestAvenueOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FiveHundredWestAvenueOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Five Hundred West Avenue Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FiveHundredWestAvenueOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Five Hundred West Avenue Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FiveHundredWestAvenueOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">500 West Avenue [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FiveHundredFiftyWestAvenueOfficeOrFlexPropertyMember" xlink:label="cli_FiveHundredFiftyWestAvenueOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_FiveHundredFiftyWestAvenueOfficeOrFlexPropertyMember" xlink:to="cli_FiveHundredFiftyWestAvenueOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_FiveHundredFiftyWestAvenueOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Five Hundred Fifty West Avenue Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FiveHundredFiftyWestAvenueOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Five Hundred Fifty West Avenue Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_FiveHundredFiftyWestAvenueOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">550 West Avenue [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_SixHundredWestAvenueOfficeOrFlexPropertyMember" xlink:label="cli_SixHundredWestAvenueOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_SixHundredWestAvenueOfficeOrFlexPropertyMember" xlink:to="cli_SixHundredWestAvenueOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_SixHundredWestAvenueOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Six Hundred West Avenue Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_SixHundredWestAvenueOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Six Hundred West Avenue Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_SixHundredWestAvenueOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">600 West Avenue [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_SixFiftyHundredWestAvenueOfficeOrFlexPropertyMember" xlink:label="cli_SixFiftyHundredWestAvenueOfficeOrFlexPropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_SixFiftyHundredWestAvenueOfficeOrFlexPropertyMember" xlink:to="cli_SixFiftyHundredWestAvenueOfficeOrFlexPropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_SixFiftyHundredWestAvenueOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Six Fifty Hundred West Avenue Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_SixFiftyHundredWestAvenueOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">Six Fifty Hundred West Avenue Office Or Flex Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_SixFiftyHundredWestAvenueOfficeOrFlexPropertyMember_lbl" xml:lang="en-US">650 West Avenue [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneThousandTwoHundredOneConnecticutAvenueNWOfficePropertyMember" xlink:label="cli_OneThousandTwoHundredOneConnecticutAvenueNWOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneThousandTwoHundredOneConnecticutAvenueNWOfficePropertyMember" xlink:to="cli_OneThousandTwoHundredOneConnecticutAvenueNWOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneThousandTwoHundredOneConnecticutAvenueNWOfficePropertyMember_lbl" xml:lang="en-US">One Thousand Two Hundred One Connecticut Avenue N W Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneThousandTwoHundredOneConnecticutAvenueNWOfficePropertyMember_lbl" xml:lang="en-US">One Thousand Two Hundred One Connecticut Avenue N W Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_OneThousandTwoHundredOneConnecticutAvenueNWOfficePropertyMember_lbl" xml:lang="en-US">1201 Connecticut Avenue, NW [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_OneThousandFourHundredLStreetNWOfficePropertyMember" xlink:label="cli_OneThousandFourHundredLStreetNWOfficePropertyMember" />
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cli_OneThousandFourHundredLStreetNWOfficePropertyMember" xlink:to="cli_OneThousandFourHundredLStreetNWOfficePropertyMember_lbl" />
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_OneThousandFourHundredLStreetNWOfficePropertyMember_lbl" xml:lang="en-US">One Thousand Four Hundred L Street N W Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_OneThousandFourHundredLStreetNWOfficePropertyMember_lbl" xml:lang="en-US">One Thousand Four Hundred L Street N W Office Property [Member]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_SixThousandThreeHundredOneIvyLaneOfficePropertyMember_lbl" xml:lang="en-US">Six Thousand Three Hundred One Ivy Lane Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_SixThousandThreeHundredOneIvyLaneOfficePropertyMember_lbl" xml:lang="en-US">Six Thousand Three Hundred One Ivy Lane Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_SixThousandThreeHundredOneIvyLaneOfficePropertyMember_lbl" xml:lang="en-US">6301 Ivy Lane [Member]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_SixThousandThreeHundredThreeIvyLaneOfficePropertyMember_lbl" xml:lang="en-US">Six Thousand Three Hundred Three Ivy Lane Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_SixThousandThreeHundredThreeIvyLaneOfficePropertyMember_lbl" xml:lang="en-US">Six Thousand Three Hundred Three Ivy Lane Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_SixThousandThreeHundredThreeIvyLaneOfficePropertyMember_lbl" xml:lang="en-US">6303 Ivy Lane [Member]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_SixThousandThreeHundredFiveIvyLaneOfficePropertyMember_lbl" xml:lang="en-US">Six Thousand Three Hundred Five Ivy Lane Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_SixThousandThreeHundredFiveIvyLaneOfficePropertyMember_lbl" xml:lang="en-US">Six Thousand Three Hundred Five Ivy Lane Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_SixThousandThreeHundredFiveIvyLaneOfficePropertyMember_lbl" xml:lang="en-US">6305 Ivy Lane [Member]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_SixThousandFourHundredFourIvyLaneOfficePropertyMember_lbl" xml:lang="en-US">Six Thousand Four Hundred Four Ivy Lane Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_SixThousandFourHundredFourIvyLaneOfficePropertyMember_lbl" xml:lang="en-US">Six Thousand Four Hundred Four Ivy Lane Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_SixThousandFourHundredFourIvyLaneOfficePropertyMember_lbl" xml:lang="en-US">6404 Ivy Lane [Member]</label>
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_SixThousandFourHundredSixIvyLaneOfficePropertyMember_lbl" xml:lang="en-US">Six Thousand Four Hundred Six Ivy Lane Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_SixThousandFourHundredSixIvyLaneOfficePropertyMember_lbl" xml:lang="en-US">Six Thousand Four Hundred Six Ivy Lane Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_SixThousandFourHundredSixIvyLaneOfficePropertyMember_lbl" xml:lang="en-US">6406 Ivy Lane [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_SixThousandFourHundredElevenIvyLaneOfficePropertyMember" xlink:label="cli_SixThousandFourHundredElevenIvyLaneOfficePropertyMember" />
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:label="cli_SixThousandFourHundredElevenIvyLaneOfficePropertyMember_lbl" xml:lang="en-US">Six Thousand Four Hundred Eleven Ivy Lane Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_SixThousandFourHundredElevenIvyLaneOfficePropertyMember_lbl" xml:lang="en-US">Six Thousand Four Hundred Eleven Ivy Lane Office Property [Member]</label>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:label="cli_SixThousandFourHundredElevenIvyLaneOfficePropertyMember_lbl" xml:lang="en-US">6411 Ivy Lane [Member]</label>
    <loc xlink:type="locator" xlink:href="cli-20111231.xsd#cli_FourThousandTwoHundredLParliamentPlaceOfficePropertyMember" xlink:label="cli_FourThousandTwoHundredLParliamentPlaceOfficePropertyMember" />
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    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="cli_FourThousandTwoHundredLParliamentPlaceOfficePropertyMember_lbl" xml:lang="en-US">Four Thousand Two Hundred L Parliament Place Office Property [Member]</label>
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