Pub. L. 91-556, tit. V, sec. 506

Sec. 506. Appropriations and funds available for the administrative expenses of the Department of Housing and Urban Development shall be available in the current, fiscal year for purchase of uniforms, or allowances therefor, as authorized by law (5 U.S.C. 5901–5902); hire of passenger motor vehicles: and services as authorized by 5 U.S.C. 3109.