A prior section 39 of act Aug. 1, 1956, was renumbered section 40 by section 504(1) of Pub. L. 99–399, and subsequently renumbered, and set out as a Short Title of 1956 Amendment note under section 2651 of this title, prior to repeal by Pub. L. 102–138, title I, § 111(1), Oct. 28, 1991, 105 Stat. 654.