community air service development program: Provided further, That in addition to airports eligible under section 41743 of title 49, United States Code, such program may include the participation of an airport that serves a community or consortium that is not larger than a small hub airport, according to FAA hub classifications effective at the time the Office of the Secretary issues a request for proposals: Provided further , That the Secretary may provide grants to any commercial service airport, notwithstanding the requirement for the airport to be located in an air quality nonattainment or maintenance area or to be able to receive emission credits in section 47102(3)(K) and 47102(3)(L) of title 49, United States Code, for work necessary to construct or modify airport facilities to provide low-emission fuel systems, gate electrification, other related air quality improvements, acquisition of airport-owned vehicles or ground support equipment with low-emission technology, provided such vehicles are used exclusively on airport property or to transport passengers and employees between the airport and the airport’s consolidated rental facility or an intermodal surface transportation facility adjacent to the airport. GRANTS-IN-AID FOR AIRPORTS For an additional amount for Grants-In-Aid for Airports , to enable the Secretary of Transportation to make grants for projects as authorized by subchapter 1 of chapter 471 and subchapter 1 of chapter 475 of title 49, United States Code, $532,392,074, to remain available through September 30, 2026: Provided, That amounts made available under this heading shall be derived from the general fund, and such funds shall not be subject to apportionment formulas, special apportionment categories, or minimum percentages under chapter 471 of title 49, United States Code: Provided further, That of the sums appropriated under this heading— (1) $482,392,074 shall be made available for the purposes, and in amounts, specified for Community Project Funding/Congressionally Directed Spending