The provisions of this chapter shall apply to the several States, the District of Columbia, the several Territories, including the trust territories, and possessions of the United States, the Panama Canal Zone, and the Commonwealth of Puerto Rico.

(June 26, 1934, ch. 750, title I, § 126, formerly § 22, as added July 31, 1946, ch. 711, § 7, 60 Stat. 745; amended May 8, 1952, ch. 245, 66 Stat. 66, renumbered § 27 and amended Pub. L. 86–354, § 1, Sept. 22, 1959, 73 Stat. 638; renumbered title I, § 126, Pub. L. 91–468, § 1(2), Oct. 19, 1970, 84 Stat. 994; amended Pub. L. 93–383, title VII, § 726, Aug. 22, 1974, 88 Stat. 720.)