Maintenance, Army Reserve , $48,000,000, to remain available until September 30, 2021, to prevent, prepare for, and respond to coronavirus: 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. Operation and Maintenance, Army National Guard For an additional amount for Operation and Maintenance, Army National Guard , $194,002,000, to remain available until September 30, 2021, to prevent, prepare for, and respond to coronavirus: 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. Operation and Maintenance, Air National Guard For an additional amount for Operation and Maintenance, Air National Guard , $79,406,000, to remain available until September 30, 2021, to prevent, prepare for, and respond to coronavirus: 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. Procurement Defense Production Act Purchases For an additional amount for Defense Production Act Purchases , $500,000,000 to remain available until September 30, 2022, to prevent, prepare for, and respond to coronavirus: Provided , That the Secretary of Defense may waive the requirements of 50 U.S.C. 5433(a)(6) on a case-by-case basis upon three days prior written notification to the Committees on Appropriations and Banking, Housing, and Urban Affairs of the Senate, and the Committees on Appropriations and Financial Services of the House of Representatives. 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. Other Department of Defense Programs Defense Health Program For an