; and (6) $3,568,868 shall be available to support technical assistance, research, demonstration, or deployment activities or projects to accelerate the adoption of zero emission buses in public transit as authorized under section 5312 of title 49, United States Code: Provided further, That amounts made available under this heading in this Act shall be derived from the general fund: Provided further, That amounts made available under this heading in this Act shall not be subject to any limitation on obligations for transit programs set forth in this or any other Act. TECHNICAL ASSISTANCE AND TRAINING For necessary expenses to carry out section 5314 of title 49, United States Code, $7,500,000, to remain available until September 30, 2025: Provided, That the assistance provided under this heading does not duplicate the activities of section 5311(b) or section 5312 of title 49, United States Code: Provided further, That amounts made available under this heading are in addition to any other amounts made available for such purposes: Provided further, That amounts made available under this heading shall not be subject to any limitation on obligations set forth in this or any other Act. CAPITAL INVESTMENT GRANTS For necessary expenses to carry out fixed guideway capital investment grants under section 5309 of title 49, United States Code, and section 3005(b) of the Fixing America's Surface Transportation Act ( Public Law 114–94 ), $2,205,000,000, to remain available until expended: Provided, That of the sums appropriated under this heading in this Act— (1) $2,130,950,000 shall be available for projects authorized under section 5309(d) of title 49, United States Code