(a) A non-Federal entity may charge to the Federal award only allowable costs incurred during the period of performance (except as described in §75.461) and any costs incurred before the HHS awarding agency or pass-through entity made the Federal award that were authorized by the Federal awarding agency or pass-through entity. Funds available to pay allowable costs during the period of performance include both Federal funds awarded and carryover balances.

(b) A non-Federal entity must liquidate all obligations incurred under the award not later than 90 days after the end of the funding period (or as specified in a program regulation) to coincide with the submission of the final Federal Financial Report (FFR). This deadline may be extended with prior written approval from the HHS awarding agency.