Section, acts Aug. 13, 1946, ch. 957, title VIII, 852, 60 Stat. 1023; Apr. 5, 1955, ch. 23, 8(a), (b), 69 Stat. 26; Sept. 8, 1960, Pub. L. 86–723, § 40, 74 Stat. 844; Feb. 28, 1970, Pub. L. 91–201, title I, § 103, 84 Stat. 17, related to prior service credits. See sections
4045 and
4056 of this title.