(Including rescission) 160. The limitations on obligations for the programs of the Federal Transit Administration shall not apply to any authority under 49 U.S.C. 5338 , previously made available for obligation, or to any other authority previously made available for obligation. 161. Notwithstanding any other provision of law, any funds appropriated before October 1, 2018, under any section of chapter 53 of title 49, United States Code, that remain available for expenditure, may be transferred to and administered under the most recent appropriation heading for any such section. 162. Of the unobligated amounts made available for fiscal years 2005 or prior fiscal years to Transit Formula Grants , a total of $46,560,000 is hereby permanently rescinded. Saint lawrence seaway development corporation The Saint Lawrence Seaway Development Corporation is hereby authorized to make such expenditures, within the limits of funds and borrowing authority available to the Corporation, and in accord with law, and to make such contracts and commitments without regard to fiscal year limitations, as provided by section 104 of the Government Corporation Control Act, as amended, as may be necessary in carrying out the programs set forth in the Corporation's budget for the current fiscal year. Operations and maintenance (harbor maintenance trust fund) For necessary expenses to conduct the operations, maintenance, and capital asset renewal activities on those portions of the Saint Lawrence Seaway owned, operated, and maintained by the Saint Lawrence Seaway Development Corporation, $36,000,000, to be derived from the Harbor Maintenance Trust Fund, pursuant to Public Law 99–662 : Provided , That of the amounts made available under this heading, not less than $16,000,000 shall be used on capital asset renewal activities. Maritime administration Maritime security program For necessary expenses to maintain and preserve a U.S.-flag merchant fleet to serve the national security needs of the United States, $300,000,000, to remain available