; or (ii) the Federal entity for which the Maritime Administration has or will provide such goods and services, depending on the agreement of the parties involved. (4) Amounts received Amounts received as reimbursements under this subsection shall be credited to the fund or account that was used to cover the costs incurred by the Secretary or, if the period of availability of obligations for that appropriation has expired, to the appropriation of funds that is currently available to the Secretary for substantially the same purpose. Amounts so credited shall be merged with amounts in such fund or account and shall be available for the same purposes, and subject to the same conditions and limitations, as amounts in such fund or account. (5) Advance Payments Payments made in advance shall be for any part of the estimated cost as determined by the Secretary of Transportation. Adjustments to the amounts paid in advance shall be made as agreed to by the Secretary of Transportation and the head of the ordering agency or unit based on the actual cost of goods or services provided. (6) Bill or request for payment A bill submitted or a request for payment is not subject to audit or certification in advance of payment. . 110. Salvage recoveries for subrogated ownership of vessels and cargoes Section 53909 of title 46, United States Code, is amended by adding at the end the following: (e) Salvage agreements Notwithstanding title XIV of the Ronald W. Reagan National Defense Authorization Act for Fiscal Year 2005 ( 10 U.S.C. 113 note), the Secretary of Transportation is authorized to enter into marine salvage agreements for the recoveries, sale, and disposal of sunken or damaged vessels, cargoes, or properties owned or insured by or on behalf of the Maritime Administration, the United States Shipping Board, the U.S. Shipping Board Bureau, the United States Maritime Commission, or the War Shipping Administration. (f) Recoveries Notwithstanding other provisions of law, the net proceeds from salvage agreements entered into as