“Chapter 641 of title 10” substituted in text for “the Act of June 30, 1938 (32 Stat. 1252), amending the Act of June 4, 1920 (41 Stat. 813)”, which had been classified to section 524 of former Title 34, Navy, on authority of act Aug. 10, 1956, ch. 1041, § 49(b), 70A Stat. 640, the first section of which enacted Title 10, Armed Forces.