; development, preservation, and documentation of the National Collections; presentation of public exhibits and performances; collection, preparation, dissemination, and exchange of information and publications; conduct of education, training, and museum assistance programs; maintenance, alteration, operation, lease agreements of no more than 30 years, and protection of buildings, facilities, and approaches; not to exceed $100,000 for services as authorized by 5 U.S.C. 3109; and purchase, rental, repair, and cleaning of uniforms for employees, $739,894,000, to remain available until September 30, 2020, except as otherwise provided herein; of which not to exceed $6,917,000 for the instrumentation program, collections acquisition, exhibition reinstallation, and the repatriation of skeletal remains program shall remain available until expended; and including such funds as may be necessary to support American overseas research centers: Provided , That funds appropriated herein are available for advance payments to independent contractors performing research services or participating in official Smithsonian presentations. Facilities capital For necessary expenses of repair, revitalization, and alteration of facilities owned or occupied by the Smithsonian Institution, by contract or otherwise, as authorized by section 2 of the Act of August 22, 1949 (63 Stat. 623), and for construction, including necessary personnel, $303,503,000, to remain available until expended, of which not to exceed $10,000 shall be for services as authorized by 5 U.S.C. 3109. 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