; (2) up to $300,000,000 shall be made available to the Secretary to distribute as discretionary grants to airports, of which not less than $25,000,000 shall be made available 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