definiens: ) exceed the Threshold Amount ( as defined in Section 11.6(c ) ) th e Additional Amount shall be based solely on a port ion of the Payment that is equal to the amount derived by subtracting the Aggregate Payments from the Thresho ld Amount . Furthermore, Receiving Party shall pay Paye r Party an amount equal to any reduction in tax rea lized by Receiving Party, or any of its Affiliates or succes sors, that is due to a deduction or credit for, or refund of, any withholding taxes that gave rise to the payment of an Additional Amount . The aggregate of all payments made by Receiving Party to Payer Party pursuant to the p receding sentence, if any, shall not exceed the agg regate of the Additional Amounts paid by Party to Receiving P arty . All payments due to Payer Party pursuant to t he two preceding sentences shall be paid no later than [ * * * ] days following the filing of the tax return or o ther report in which such deduction, credit or refund is claimed