shall remain available until expended for the Short Sea Transportation Program (America's Marine Highways) to make grants for the purposes authorized under sections 55601(b)(1) and (3) of title 46, United States Code: Provided further , That available balances under this heading for the Short Sea Transportation Program (America’s Marine Highways) from prior year recoveries shall be available to carry out activities authorized under sections 55601(b)(1) and (3) of title 46, United States Code: Provided further , That from funds provided under the previous two provisos, the Secretary of Transportation shall make grants no later than 180 days after enactment of this Act in such amounts as the Secretary determines: Provided further , That any unobligated balances available from previous appropriations for programs and activities supporting State Maritime Academies shall be transferred to and merged with the appropriations for Maritime Administration, State Maritime Academy Operations and shall be made available for the same purposes. State maritime academy operations For necessary expenses of operations, support and training activities for State Maritime Academies, $345,200,000, of which $25,000,000, to remain available until expended, shall be for maintenance, repair, life extension, and capacity improvement of National Defense Reserve Fleet training ships in support of State Maritime Academies, of which $8,000,000, to remain available until expended, shall be for expenses related to training mariners for costs associated with training vessel sharing pursuant to 46 U.S.C. 51504(g)(3) for costs associated with mobilizing, operating and demobilizing the vessel, including travel costs for students, faculty and crew, the costs of the general agent, crew costs, fuel, insurance, operational fees, and vessel hire costs, as determined by the Secretary, of which $300,000,000, to remain available until expended, shall be for the National Security Multi-Mission Vessel Program, including funds for construction, planning,