The text of subsec. (b)(3) of section 2305 of this title, which was transferred to this section and amended by Pub. L. 116–283, § 1816(c)(1), (2)(B), (4) was based on Pub. L. 98–369, div. B, title VII, § 2723(b), July 18, 1984, 98 Stat. 1192; Pub. L. 101–510, div. A, title VIII, § 802(d)(2), Nov. 5, 1990, 104 Stat. 1589; Pub. L. 103–355, title I, § 1013(a), Oct. 13, 1994, 108 Stat. 3255.

A prior section 3302, act Aug. 10, 1956, ch. 1041, 70A Stat. 187, related to promotion to captain, major, or lieutenant colonel of commissioned officers of Medical Corps, Dental Corps, and Veterinary Corps upon examination of professional fitness and effect upon failure of promotion, prior to repeal by Pub. L. 96–513, title II, § 204, title VII, § 701, Dec. 12, 1980, 94 Stat. 2880, 2955, effective Sept. 15, 1981. See sections 631 and 632 of this title.

2021—Subsec. (a). Pub. L. 116–283, § 1816(c)(4)(A), (C), redesignated subsec. (b)(3) of section 2305 of this title as subsec. (a) of this section and inserted heading. Former second and third sentences of subsec. (a) designated subsecs. (b) and (c), respectively.

Subsec (b). Pub. L. 116–283, § 1816(c)(4)(B), (D), designated second sentence of subsec. (a) as subsec. (b) of this section, inserted heading, and substituted “section 3301(a) of this title” for “paragraph (1)” and “section 3301(b) of this title” for “paragraph (2)”.

Subsec. (c). Pub. L. 116–283, § 1816(c)(4)(B), (E), designated third sentence of subsec. (a) as subsec. (c) of this section and inserted heading.

Section and amendment by Pub. L. 116–283 effective Jan. 1, 2022, with additional provisions for delayed implementation and applicability of existing law, see section 1801(d) of Pub. L. 116–283, set out as an Effective Date of 2021 Amendment note preceding section 3001 of this title.