shall be used for the projects, and in the amounts specified under the heading Military Construction, Navy and Marine Corps in the report accompanying this Act, to remain available until September 30, 2025: Provided , That, of this amount, not to exceed $160,710,000 shall be available for study, planning, design, and architect and engineer services, as authorized by law, unless the Secretary of the Navy determines that additional obligations are necessary for such purposes and notifies the Committees on Appropriations of both Houses of Congress of the determination and the reasons therefor. Military construction, air force For acquisition, construction, installation, and equipment of temporary or permanent public works, military installations, facilities, and real property for the Air Force as currently authorized by law, $569,792,000, shall be used for the projects, and in the amounts specified under the heading Military Construction, Air Force in the report accompanying this Act, to remain available until September 30, 2025: Provided , That, of this amount, not to exceed $166,192,000 shall be available for study, planning, design, and architect and engineer services, as authorized by law, unless the Secretary of the Air Force determines that additional obligations are necessary for such purposes and notifies the Committees on Appropriations of both Houses of Congress of the determination and the reasons therefor. Military construction, defense- W ide For acquisition, construction, installation, and equipment of temporary or permanent public works, installations, facilities, and real property for activities and agencies of the Department of Defense (other than the military departments), as currently authorized by law, $2,234,517,000, shall be used for the projects, and in the amounts specified under the heading Military Construction, Defense-Wide in the report accompanying this Act, to remain available until September 30, 2025: Provided , That, of the amount, not to exceed $179,976,000 shall be available for