A prior section 2521, added Pub. L. 102–484, div. D, title XLII, § 4231(a), Oct. 23, 1992, 106 Stat. 2686, related to National Defense Manufacturing Technology Program, prior to repeal by Pub. L. 104–106, div. A, title X, § 1081(f), Feb. 10, 1996, 110 Stat. 454.

Another prior section 2521, added Pub. L. 102–190, div. A, title VIII, § 821(a), Dec. 5, 1991, 105 Stat. 1426, defined terms for purposes of former chapter 150 of this title, prior to repeal and restatement in section 2491 (now 4801) of this title by Pub. L. 102–484, §§ 4202(a), 4203(a).

Another prior section 2521 was renumbered section 2540 of this title and subsequently repealed.