Upon the occurrence of any event triggering the prepayment requirement under clauses (i) through and including (iii) above, the Borrower shall promptly deliver a Notice of Prepayment to the Administrative Agent and upon receipt of such notice, the Administrative Agent shall promptly so notify the Lenders. Each prepayment of the Loans under this Section shall be applied as follows: except as otherwise provided in any Extension Amendment or otherwise agreed by the Borrower and the applicable Incremental Term Loan Lenders, ratably between each Class of Term Loans then outstanding (with prepayments applied to reduce up to the next eight remaining scheduled principal installments of each Class of Term Loans in direct order of maturity and thereafter to the remaining scheduled principal installments on a pro rata basis). For the avoidance of doubt and notwithstanding the foregoing, no mandatory prepayments shall be required under this Section  4.4(b) , so long as no Term Loans exist hereunder.