Section 1681(c) of the John S. McCain National Defense Authorization Act for Fiscal Year 2019, referred to in subsec. (a), is section 1681(c) of Pub. L. 115–232, div. A, title XVI, Aug. 13, 2018, 132 Stat. 2161, which is not classified to the Code.

A prior section 5534, act Aug. 10, 1956, ch. 1041, 70A Stat. 318, set forth term of enlistments in Regular Navy or Regular Marine Corps and provided that Secretary of Navy could prescribe grades or ratings in which such enlistments could be made, prior to repeal by Pub. L. 90–235, § 2(a)(3), (b), Jan. 2, 1968, 81 Stat. 756.

Provisions similar to those in this section were contained in Pub. L. 114–92, div. A, title XVI, § 1675, Nov. 25, 2015, 129 Stat. 1131, as amended by Pub. L. 116–92, div. A, title IX, § 902(69), Dec. 20, 2019, 133 Stat. 1551; Pub. L. 116–283, div. A, title X, § 1081(f)(3), Jan. 1, 2021, 134 Stat. 3875, which was set out in a note under section 4205 of this title, prior to repeal by Pub. L. 118–159, div. A, title XVI, § 1649(b)(7), Dec. 23, 2024, 138 Stat. 2199.