PUBLIC LAW 101-512—NOV. 5, 1990 104 STAT. 1955 NATIONAL GALLERY OF ART SALARIES AND EXPENSES For the upkeep and operations of the National Gallery of Art, the protection and care of the works of art therein, and administrative expenses incident thereto, as authorized by the Act of March 24, 1937 (50 Stat. 51), as amended by the public resolution of April 13, 1939 (Public Resolution 9, Seventy-sixth Congress), including services as authorized by 5 U.S.C. 3109; payment in advance when authorized by the treasurer of the Gallery for membership in library, museum, and art associations or societies whose publications or services are available to members only, or to members at a price lower than to the general public; purchase, repair, and cleaning of uniforms for guards, and uniforms, or allowances therefor, for other employees as authorized by law (5 U.S.C. 5901-5902); purchase, or rental of devices and services for protecting buildings and contents thereof, and maintenance, alteration, improvement, and repair of buildings, approaches, and grounds; and purchase of services for restoration and repair of works of art for the National Gallery of Art by contracts made, without advertising, with individuals, firms, or organizations at such rates or prices and under such terms and conditions as the Gallery may deem proper, $46,276,000, of which not to exceed $4,370,000 for the special exhibition program shall remain available until expended. REPAIR, RESTORATION AND RENOVATION OF BUILDINGS For necessary expenses of repair, restoration and renovation of buildings, grounds and facilities owned or occupied by the National Gallery of Art, by contract or otherwise, as authorized, $3,505,000, to remain available until expended: Provided, That contracts awarded for environmental systems, protection systems, and exterior repair or renovation of buildings of the National Gallery of Art may be negotiated with selected contractors and awarded on the basis of contractor qualifications as well as price. WooDROw WILSON INTERNATIONAL CENTER FOR SCHOLARS SALARIES AND EXPENSES For expenses necessary in carrying out the provisions of the Woodrow Wilson Memorial Act of 1968 (82 Stat. 1356) including hire of passenger vehicles and services as authorized by 5 U.S.C. 3109, $5,074,000. PAYMENT TO ENDOWMENT CHALLENGE FUND Funds appropriated pursuant to Public Law 100-446, 102 Stat. 1820, for payment to the Endowment Challenge Fund for the Woodrow Wilson International Center for Scholars and not transferred to the Center as of September 30, 1990, shall remain available until September 30, 1992: Provided, That such sums shall be transferred only to the extent matched on a three-to-one basis by private funds.