10 U.S.C. § 4023 (ARMED FORCES)
§ 4023. Procurement for experimental purposes
(a) Authority.—
The Secretary of Defense and the Secretaries of the military departments may each buy demonstrations, prototypes, products, supplies, parts, accessories, auxiliary services, and design for products or services that the Secretary of Defense or the Secretary concerned considers necessary for experimental or test purposes in the development of the best supplies that are needed for the national defense.
(b) Procedures.—
Purchases under this section may be made or modified inside or outside the United States and by contract or otherwise. Chapter 137 1 of this title applies only when such purchases are made in quantities greater than necessary for prototyping, experimentation, technical evaluation, assessment of operational utility, or safety or to provide a residual operational capability.
(Added Pub. L. 103–160, div. A, title VIII, § 822(c)(1), Nov. 30, 1993, 107 Stat. 1706, § 2373; amended Pub. L. 103–337, div. A, title X, § 1070(g), Oct. 5, 1994, 108 Stat. 2859; Pub. L. 104–106, div. A, title VIII, § 812, Feb. 10, 1996, 110 Stat. 395; Pub. L. 114–92, div. A, title VIII, § 814, Nov. 25, 2015, 129 Stat. 893; Pub. L. 115–232, div. A, title VIII, § 886, Aug. 13, 2018, 132 Stat. 1916; renumbered § 4023, Pub. L. 116–283, div. A, title XVIII, § 1841(b)(1), Jan. 1, 2021, 134 Stat. 4243; Pub. L. 117–81, div. A, title XVII, § 1701(u)(2)(B), Dec. 27, 2021, 135 Stat. 2151; Pub. L. 119–60, div. A, title XVIII, § 1831, Dec. 18, 2025, 139 Stat. 1252.)
heading: Editorial Notes
heading: References in Text
text: Chapter 137 of this title, referred to in subsec. (b), was repealed by Pub. L. 116–283, div. A, title XVIII, § 1881(a), Jan. 1, 2021, 134 Stat. 4293, effective Jan. 1, 2022, in conjunction with the transfer and reorganization of acquisition provisions in this title by Pub. L. 116–283, div. A, title XVIII, Jan. 1, 2022, 134 Stat. 4149. For definition of “chapter 137 legacy provisions”, see section 3016 of this title.
heading: Prior Provisions
text: A prior section 4023, act Aug. 10, 1956, ch. 1041, 70A Stat. 233, related to employment of civilians in service club and library services, prior to repeal by Pub. L. 87–651, title I, § 116(1), Sept. 7, 1962, 76 Stat. 513.
Provisions similar to those in this section were contained in sections 4504 and 9504 of this title, prior to repeal by Pub. L. 103–160, § 822(c)(2).
heading: Amendments
text: 2025—Subsec. (a). Pub. L. 119–60, § 1831(1), substituted “demonstrations, prototypes, products, supplies, parts, accessories, auxiliary services, and design for products or services” for “ordnance, signal, chemical activity, transportation, energy, medical, space-flight, telecommunications, and aeronautical supplies, including parts and accessories, and designs thereof,”.
Subsec. (b). Pub. L. 119–60, § 1831(2), inserted “or modified” after “may be made” and “prototyping,” after “greater than necessary for”.
2021—Pub. L. 116–283, § 1841(b)(1), as amended by Pub. L. 117–81, § 1701(u)(2)(B), renumbered section 2373 of this title as this section.
2018—Subsec. (a). Pub. L. 115–232 inserted “telecommunications,” after “space-flight,”.
2015—Subsec. (a). Pub. L. 114–92, § 814(a), inserted “transportation, energy, medical, space-flight,” before “and aeronautical supplies”.
Subsec. (b). Pub. L. 114–92, § 814(b), substituted “only when such purchases are made in quantities greater than necessary for experimentation, technical evaluation, assessment of operational utility, or safety or to provide a residual operational capability” for “only when such purchases are made in quantity”.
1996—Subsec. (b). Pub. L. 104–106 inserted “only” after “applies” in second sentence.
1994—Subsec. (a). Pub. L. 103–337 substituted “chemical activity, and aeronautical supplies,” for “and chemical activity supplies,”.
heading: Statutory Notes and Related Subsidiaries
heading: Effective Date of 2021 Amendment
text: Amendment by Pub. L. 117–81 applicable as if included in the enactment of title XVIII of Pub. L. 116–283 as enacted, see section 1701(a)(2) of Pub. L. 117–81, set out in a note preceding section 3001 of this title and note below.
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 a note preceding section 3001 of this title.