All engineers and others who are engaged in heating and ventilating the Senate wing of the Capitol shall be subject to the orders and in all respects under the direction of the Architect of the Capitol, subject to the approval of the Senate Committee on Rules and Administration.
(July 11, 1888, ch. 615, 25 Stat. 258; Aug. 2, 1946, ch. 753, title I, § 102, title II, § 224, 60 Stat. 814, 838.)