Administration assists transit recipients with frontline workforce development and standards based training in maintenance and operations through an agreement with a national nonprofit organization with a demonstrated capacity to develop and provide such programs though labor management partnerships and apprenticeships: Provided , That the assistance provided under this heading does not duplicate the activities of 49 U.S.C. 5311(b) or 49 U.S.C. 5312 . 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, $2,301,785,760, to remain available until September 30, 2024: Provided , That of the amounts made available under this heading, $1,841,428,608 shall be obligated by December 31, 2021, but shall remain available until September 30, 2024, as specified under this heading: Provided further , That of the amounts made available under this heading: (1) $795,290,221 shall be available for fixed guideway projects that have executed full funding grant agreements, authorized under subsection (d) of section 5309