; $53,741,000, to be deposited into the Federal Citizen Services Fund: Provided , That the previous amount may be transferred to Federal agencies to carry out the purpose of the Federal Citizen Services Fund: Provided further , That the appropriations, revenues, reimbursements, and collections deposited into the Fund shall be available until expended for necessary expenses of Federal Citizen Services and other activities that enable the Federal Government to enhance its ability to conduct activities electronically: in the aggregate amount not to exceed $100,000,000: Provided further , That appropriations, revenues, reimbursements, and collections accruing to this Fund during fiscal year 2018 in excess of such amount shall remain in the Fund and shall not be available for expenditure except as authorized in appropriations Acts: Provided further , That any appropriations provided to the Electronic Government Fund that remain unobligated may be transferred to the Federal Citizen Services Fund: Provided further , That the transfer authorities provided herein shall be in addition to any other transfer authority provided in this Act. Asset Proceeds and Space Management Fund For carrying out the purposes of the Federal Assets Sale and Transfer Act of 2016 ( Public Law 114–287 ), $10,000,000, to be deposited into the Asset Proceeds and Space Management Fund, to remain available until expended. Environmental Review Improvement Fund For necessary expenses of the Environmental Review Improvement Fund established under section 41009(d) of the Fixing America’s Surface Transportation Act ( 42 U.S.C. 4370m–8(d) ), $1,000,000, to remain available until expended. Administrative Provisions—General Services Administration (including rescission and transfer of funds) 510. Funds available to the General Services Administration shall be available for the hire of passenger motor vehicles. 511. Funds in the Federal Buildings Fund made available for fiscal year 2018 for Federal Buildings Fund activities may be transferred between such