; and purchase and exchange, maintenance, repair, and operation of a passenger motor vehicle; all under the direction of the Joint Committee on the Library, $12,613,000, of which $2,600,000 shall remain available until September 30, 2022: Provided , That, of the amount made available under this heading, the Architect of the Capitol may obligate and expend such sums as may be necessary for the maintenance, care and operation of the National Garden established under section 307E of the Legislative Branch Appropriations Act, 1989 ( 2 U.S.C. 2146 ), upon vouchers approved by the Architect of the Capitol or a duly authorized designee. Capitol Visitor Center For all necessary expenses for the operation of the Capitol Visitor Center, $20,557,000. Administrative Provisions No bonuses for contractors behind schedule or over budget 110. None of the funds made available in this Act for the Architect of the Capitol may be used to make incentive or award payments to contractors for work on contracts or programs for which the contractor is behind schedule or over budget, unless the Architect of the Capitol, or agency-employed designee, determines that any such deviations are due to unforeseeable events, government-driven scope changes, or are not significant within the overall scope of the project and/or program. scrims 111. None of the funds made available by this Act may be used for scrims containing photographs of building facades during restoration or construction projects performed by the Architect of the Capitol. LIBRARY OF CONGRESS Salaries and Expenses For all necessary expenses of the Library of Congress not otherwise provided for, including development and maintenance of the Library's catalogs; custody and custodial care of the Library buildings; special clothing; cleaning, laundering and repair of uniforms; preservation of motion pictures in the custody of the Library; operation and maintenance of the American Folklife Center in the Library