Relief for Aviation Workers For necessary expenses for providing pandemic relief for aviation workers, $40,000,000,000, to remain available until September 30, 2021 of which $37,000,000,000 shall be for the purposes authorized in section 101(a)(1)(A) of title I of division R of the Take Responsibility for Workers and Families Act , and $3,000,000,000, shall be for the purposes authorized in section 101(a)(1)(B) of title I of division R of the Take Responsibility for Workers and Families Act : Provided , 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. In addition, for the cost of making direct loans and loan guarantees in accordance with the terms and conditions in sections 101–103 and 105 of title I of division R of the Take Responsibility for Workers and Families Act , such sums as may be necessary to remain available until September 30, 2021: Provided , That such costs, including the cost of modifying such loans, shall be defined by section 502 of the Congressional Budget Act of 1974: Provided further , That subject to section 502 of the Congressional Budget Act of 1974, during fiscal years 2020 and 2021, the aggregate sum of the principle for direct loans and guaranteed loans shall not exceed $21,000,000,000: 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 aviation administration Operations (airport and airway trust fund) Of the amounts made available from the Airport and Airway Trust Fund for Federal Aviation Administration—Operations in title XI of subdivision 1 of division B of the Bipartisan Budget Act of 2018 ( Public Law 115–123 ), not more than $25,000,000 may be used to prevent, prepare for, and respond to coronavirus: Provided , That amounts repurposed under this heading in this Act that were