(a) The Borrower agrees to pay to the Administrative Agent for the account of each USD Lender in accordance with its Applicable Percentage under the USD Credit Facility a commitment fee in Dollars, which shall accrue at a rate per annum equal to the Applicable Margin for determining Commitment Fees times the actual daily amount by which the aggregate amount of the USD Credit Facility exceeds the outstanding amount of the USD Committed Loans during the period from and including the date hereof to but excluding the date on which the Aggregate USD Commitments terminate, subject to adjustment as provided in Section 2.24 . The commitment fees described in this Section 2.13(a) shall be due and payable quarterly in arrears on the last Business Day of each March, June, September and December of each year, commencing with the first such date to occur after the Closing Date, and with respect to such fees owing to USD Lenders, on the last day of the USD Availability Period for the USD Credit Facility. The commitment fees described in this Section 2.13(a) shall be calculated quarterly in arrears, and if there is any change in the Applicable Margin for determining Commitment Fees during any quarter, the actual daily amount shall be computed and multiplied by the Applicable Margin for determining Commitment Fees separately for each period during such quarter that such Applicable Margin was in effect. All commitment fees described in this Section 2.13(a) shall be computed on the basis of a year of 360 days and shall be payable for the actual number of days elapsed (including the first day but excluding the last day). For the avoidance of doubt, the outstanding amount of USD Swing Line Loans shall not be counted towards or considered usage of USD Commitments for purposes of determining the Commitment Fee in this Section 2.13(a) .