; and, in addition, $8,385,000,000, plus reimbursements shall become available on October 1, 2018, and shall remain available until September 30, 2019: Provided , That, of the amount made available on October 1, 2018 under this heading, $2,000,000,000 shall remain available until September 30, 2022. Medical support and compliance For necessary expenses in the administration of the medical, hospital, nursing home, domiciliary, construction, supply, and research activities, as authorized by law; administrative expenses in support of capital policy activities; and administrative and legal expenses of the Department for collecting and recovering amounts owed the Department as authorized under chapter 17 of title 38, United States Code, and the Federal Medical Care Recovery Act ( 42 U.S.C. 2651 et seq.), $100,000,000, which shall be in addition to funds previously appropriated under this heading that become available on October 1, 2017; and, in addition, $7,239,000,000, plus reimbursements, shall become available on October 1, 2018, and shall remain available until September 30, 2019: Provided , That, of the amount made available on October 1, 2018, under this heading, not to exceed 5 percent shall remain available until September 30, 2020. Medical facilities For necessary expenses for the maintenance and operation of hospitals, nursing homes, domiciliary facilities, and other necessary facilities of the Veterans Health Administration; for administrative expenses in support of planning, design, project management, real property acquisition and disposition, construction, and renovation of any facility under the jurisdiction or for the use of the Department; for oversight, engineering, and architectural activities not charged to project costs; for repairing, altering, improving, or providing facilities in the several hospitals and homes under the jurisdiction of the Department, not otherwise provided for, either by contract or by the hire of temporary employees and purchase of materials; for leases of facilities