10 U.S.C. § 12242Section
§ 12242. Warrant officers: promotion
The promotion of permanent reserve warrant officers not on the warrant officer active-duty list to permanent reserve warrant officer grades shall be governed by such regulations as the Secretary concerned may prescribe.
(Aug. 10, 1956, ch. 1041, 70A Stat. 26, §598; Pub. L. 102–190, div. A, title XI, §1131(3), Dec. 5, 1991, 105 Stat. 1505; renumbered §12242, Pub. L. 103–337, div. A, title XVI, §1662(d)(2), Oct. 5, 1994, 108 Stat. 2991.)