; and purchase, lease, charter, maintenance, and operation of mission and administrative aircraft, $2,826,900,000, to remain available until September 30, 2019. Construction and environmental compliance and restoration For necessary expenses for construction of facilities including repair, rehabilitation, revitalization, and modification of facilities, construction of new facilities and additions to existing facilities, facility planning and design, and restoration, and acquisition or condemnation of real property, as authorized by law, and environmental compliance and restoration, $496,100,000, to remain available until September 30, 2023: Provided , That proceeds from leases deposited into this account shall be available for a period of 5 years to the extent and in amounts as provided in annual appropriations Acts: Provided further , That such proceeds referred to in the preceding proviso shall be available for obligation for fiscal year 2018 in an amount not to exceed $9,470,300: Provided further , That each annual budget request shall include an annual estimate of gross receipts and collections and proposed use of all funds collected pursuant to section 20145 of title 51, United States Code. Office of inspector general For necessary expenses of the Office of Inspector General in carrying out the Inspector General Act of 1978, $38,000,000, of which $500,000 shall remain available until September 30, 2019. Administrative provisions (including transfers of funds) Funds for any announced prize otherwise authorized shall remain available, without fiscal year limitation, until a prize is claimed or the offer is withdrawn. Not to exceed 5 percent of any appropriation made available for the current fiscal year for the National Aeronautics and Space Administration in this Act may be transferred between such appropriations, but no such appropriation, except as otherwise specifically provided, shall be increased by more than 10 percent by any such transfers. Balances so transferred shall be merged with and available for