Section, acts Aug. 10, 1956, ch. 1041, 70A Stat. 177;
Pub. L. 87–143, § 1(1), Aug. 17, 1961,
75 Stat. 364;
Pub. L. 90–235, § 2(a)(2)(A), Jan. 2, 1968,
81 Stat. 756;
Pub. L. 96–513, title V, § 512(3), Dec. 12, 1980,
94 Stat. 2929, provided that, in peace time, Army enlistment was available only to citizens and persons lawfully admitted to the United States for permanent residence.