251(b)(2)(A)(i) of the Balanced Budget and Emergency Deficit Control Act of 1985. 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, $2,500,000,000, to remain available until September 30, 2023: Provided, That amounts made available under this heading in this title shall be derived from the general fund, and such funds shall not be subject to apportionment formulas, special apportionment categories, or minimum percentages under such chapter 471: Provided further, That the Secretary shall distribute funds provided under this heading as discretionary grants to airports: Provided further, That the amount made available under this heading in this title shall not be subject to any limitation on obligations for the Grants-in-Aid for Airports program set forth in any Act: Provided further, That not less than $250,000,000 of the grants awarded under this heading in this title shall be for airport sustainability activities focused on reducing energy consumption, noise impacts, waste, and pollution or improving water quality, community relations, and wildlife compatibility: Provided further, That priority consideration shall be based on project justification and completeness of pre-grant actions: Provided further, That the Administrator of the Federal Aviation Administration may retain up to 0.1 percent of the funds provided under this heading in this title to fund the award and oversight by the Administrator of grants made under this heading: Provided further, That such amount is designated by the Congress as being for an emergency requirement pursuant to section 251(b)(2)(A)(i) of the Balanced Budget and Emergency Deficit Control Act of 1985. Federal railroad administration Consolidated rail infrastructure and safety improvements (including transfer of funds) For an additional amount for Consolidated Rail