Pub. L. 113-235, div. K, tit. I, sec. 180

Sec. 180. During the current fiscal year, applicable appropriations to the Department of Transportation shall be available for maintenance and operation of aircraft; hire of passenger motor vehicles and aircraft; purchase of liability insurance for motor vehicles operating in foreign countries on official department business; and uniforms or allowances therefor, as authorized by law (5 U.S.C. 5901–5902).