Title 50War and National DefenseRelease 119-73

§4552 Definitions

Title 50 › Chapter CHAPTER 55— - DEFENSE PRODUCTION › Subchapter SUBCHAPTER III— - GENERAL PROVISIONS › § 4552

Last updated Apr 6, 2026|Official source

Summary

Gives simple meanings for words used in this chapter about defense industry and national security. A "critical component" means parts, subsystems, tools, or test gear needed to make, fix, keep, or operate weapons or other equipment the President says are vital to national security; items found critical in a National Security Assessment under 10 U.S.C. 113(i) or by a Presidential finding after a petition under 19 U.S.C. 1862 are treated as critical unless the President decides they are not. "Critical infrastructure" means physical or cyber systems so important that their loss would seriously hurt national security, the economy, or public health and safety. "Critical technology" is any technology the President marks as essential to defense. A "critical technology item" is material that uses or comes from a critical technology. A "defense contractor" is anyone who contracts with the U.S. to supply materials, industrial resources, or critical technology for defense, or to do defense services. The "domestic industrial base" is U.S. sources that provide or are expected to provide materials or services for defense in peace, emergency, or war. A "domestic source" normally does almost all R&D, engineering, manufacturing, and production in the U.S. or Canada and buys components from similar firms; for subchapter II, Australia or the United Kingdom may count too under limits described in the law, and “national defense matter” is defined by 10 U.S.C. 301 or 50 U.S.C. 98h–1(f). "Facilities" covers buildings and other property improvements (not farms, places of worship, or private homes) and services to use them. A "foreign source" is any business that is not a domestic source. A "guaranteeing agency" is a U.S. department or agency that buys for national defense. "Homeland security" means preventing, reducing vulnerability to, limiting damage from, and recovering from terrorist attacks. "Industrial resources" are the materials, services, processes, or equipment (and their supporting tech and services) needed for a modern defense industrial base. "Materials" include raw materials, parts (including critical components), products, supply items, and related technical information or services. "National defense" covers military and energy production or construction, defense or critical infrastructure aid to other nations, homeland security, stockpiling, space, and directly related activities, and it includes emergency preparedness under title VI of the Stafford Act (42 U.S.C. 5195 et seq.) and critical infrastructure protection and restoration. "Person" means an individual, company, group, legal successor or representative, or any State or local government or agency. "Services" means efforts tied to making, using, moving, or building industrial resources or critical tech items, or other defense programs. A "small business concern" is a business that meets section 632(a) of title 15 and its regulations, including those owned by socially and economically disadvantaged individuals or by women.

Full Legal Text

Title 50, §4552

War and National Defense — Source: USLM XML via OLRC

For purposes of this chapter, the following definitions shall apply:
(1)The term “critical component” includes such components, subsystems, systems, and related special tooling and test equipment essential to the production, repair, maintenance, or operation of weapon systems or other items of equipment identified by the President as being essential to the execution of the national security strategy of the United States. Components identified as critical by a National Security Assessment conducted pursuant to section 113(i) of title 10 or by a Presidential determination as a result of a petition filed under section 1862 of title 19 shall be designated as critical components for purposes of this chapter, unless the President determines that the designation is unwarranted.
(2)The term “critical infrastructure” means any systems and assets, whether physical or cyber-based, so vital to the United States that the degradation or destruction of such systems and assets would have a debilitating impact on national security, including, but not limited to, national economic security and national public health or safety.
(3)The term “critical technology” includes any technology designated by the President to be essential to the national defense.
(4)The term “critical technology item” means materials directly employing, derived from, or utilizing a critical technology.
(5)The term “defense contractor” means any person who enters into a contract with the United States—
(A)to furnish materials, industrial resources, or a critical technology for the national defense; or
(B)to perform services for the national defense.
(6)The term “domestic industrial base” means domestic sources which are providing, or which would be reasonably expected to provide, materials or services to meet national defense requirements during peacetime, national emergency, or war.
(7)(A)Except as provided in subparagraph (B), the term “domestic source” means a business concern—
(i)that performs in the United States or Canada substantially all of the research and development, engineering, manufacturing, and production activities required of such business concern under a contract with the United States relating to a critical component or a critical technology item; and
(ii)that procures from business concerns described in clause (i) substantially all of any components and assemblies required under a contract with the United States relating to a critical component or critical technology item.
(B)(i)For purposes of subchapter II, the term “domestic source” means a business concern that—
(I)performs substantially all of the research and development, engineering, manufacturing, and production activities required of such business concern under a contract with the United States relating to a critical component or a critical technology item in—
(aa)the United States or Canada; or
(bb)subject to clause (ii), Australia or the United Kingdom; and
(II)procures from business concerns described in subclause (I) substantially all of any components or assemblies required under a contract with the United States relating to a critical component or critical technology item.
(ii)(I)A business concern described in clause (i)(I)(bb) may be treated as a domestic source only for purposes of the exercise of authorities under subchapter II relating to national defense matters that cannot be fully addressed with business concerns described in clause (i)(I)(aa).
(II)For purposes of subclause (I), the term “national defense matter” is a matter relating to the development or production of—
(aa)a defense article, as defined in section 301 of title 10; or
(bb)materials critical to national security, as defined in section 98h–1(f) of this title.
(8)The term “facilities” includes all types of buildings, structures, or other improvements to real property (but excluding farms, churches or other places of worship, and private dwelling houses), and services relating to the use of any such building, structure, or other improvement.
(9)The term “foreign source” means a business entity other than a “domestic source”.
(10)The term “guaranteeing agency” means a department or agency of the United States engaged in procurement for the national defense.
(11)The term “homeland security” includes efforts—
(A)to prevent terrorist attacks within the United States;
(B)to reduce the vulnerability of the United States to terrorism;
(C)to minimize damage from a terrorist attack in the United States; and
(D)to recover from a terrorist attack in the United States.
(12)The term “industrial resources” means materials, services, processes, or manufacturing equipment (including the processes, technologies, and ancillary services for the use of such equipment) needed to establish or maintain an efficient and modern national defense industrial base.
(13)The term “materials” includes—
(A)any raw materials (including minerals, metals, and advanced processed materials), commodities, articles, components (including critical components), products, and items of supply; and
(B)any technical information or services ancillary to the use of any such materials, commodities, articles, components, products, or items.
(14)The term “national defense” means programs for military and energy production or construction, military or critical infrastructure assistance to any foreign nation, homeland security, stockpiling, space, and any directly related activity. Such term includes emergency preparedness activities conducted pursuant to title VI of The Robert T. Stafford Disaster Relief and Emergency Assistance Act [42 U.S.C. 5195 et seq.] and critical infrastructure protection and restoration.
(15)The term “person” includes an individual, corporation, partnership, association, or any other organized group of persons, or legal successor or representative thereof, or any State or local government or agency thereof.
(16)The term “services” includes any effort that is needed for or incidental to—
(A)the development, production, processing, distribution, delivery, or use of an industrial resource or a critical technology item;
(B)the construction of facilities;
(C)the movement of individuals and property by all modes of civil transportation; or
(D)other national defense programs and activities.
(17)The term “small business concern” means a business concern that meets the requirements of section 632(a) of title 15 and the regulations promulgated pursuant to that section, and includes such business concerns owned and controlled by socially and economically disadvantaged individuals or by women.

Legislative History

Notes & Related Subsidiaries

Termination of SectionFor termination of section, see section 4564(a) of this title.

Editorial Notes

References in Text

This chapter, referred to in text, was in the original “this Act”, meaning act Sept. 8, 1950, ch. 932, 64 Stat. 798, known as the Defense Production Act of 1950, which is classified principally to this chapter. For complete classification of this Act to the Code, see section 4501 of this title and Tables. The Robert T. Stafford Disaster Relief and Emergency Assistance Act, referred to in par. (14), is Pub. L. 93–288, May 22, 1974, 88 Stat. 143. Title VI of the Act is classified generally to subchapter IV–B (§ 5195 et seq.) of chapter 68 of Title 42, The Public Health and Welfare. For complete classification of this Act to the Code, see

Short Title

note set out under section 5121 of Title 42 and Tables. Codification Section was formerly classified to section 2152 of the former Appendix to this title prior to editorial reclassification and renumbering as this section.

Amendments

2023—Par. (7). Pub. L. 118–31 designated existing provisions as subpar. (A), inserted heading, substituted “Except as provided in subparagraph (B), the term” for “The term” in introductory provisions, redesignated former subpars. (A) and (B) as cls. (i) and (ii), respectively, of subpar. (A) and realigned margins, substituted “clause (i)” for “subparagraph (A)” in cl. (ii), and added subpar. (B). 2009—Par. (1). Pub. L. 111–67, § 8(1), substituted “equipment identified by the President” for “military equipment identified by the Secretary of Defense”. Pars. (2), (3). Pub. L. 111–67, § 8(2)–(4), added par. (3), redesignated former par. (3) as (2), and struck out former par. (2). Prior to amendment, text of par. (2) read as follows: “The term ‘critical industry for national security’ means any industry (or industry sector) identified pursuant to section 2503(6) of title 10 and such other industries or industry sectors as may be designated by the President as essential to provide industrial resources required for the execution of the national security strategy of the United States.” Pars. (4), (5). Pub. L. 111–67, § 8(2), (5), redesignated pars. (5) and (6) as (4) and (5), respectively, and struck out former par. (4). Prior to amendment, text of par. (4) read as follows: “The term ‘critical technology’ includes any technology that is included in 1 or more of the plans submitted pursuant to section 6681 of title 42 or section 2508 of title 10 (unless subsequently deleted), or such other emerging or dual use technology as may be designated by the President.” Par. (6). Pub. L. 111–67, § 8(5), (6), redesignated par. (7) as (6), in heading, struck out “defense” after “Domestic”, and, in text, substituted “ ‘domestic industrial base’ ” for “ ‘domestic defense industrial base’ ” and struck out “graduated mobilization,” after “peacetime,”. Former par. (6) redesignated (5). Pars. (7) to (9). Pub. L. 111–67, § 8(2), (5), (7), redesignated pars. (8), (10), and (11) as (7) to (9), respectively, and struck out former par. (9). Prior to amendment, text of par. (9) read as follows: “The term ‘essential weapon system’ means a major weapon system and other items of military equipment identified by the Secretary of Defense as being essential to the execution of the national security strategy of the United States.” Former par. (7) redesignated (6). Pars. (10), (11). Pub. L. 111–67, § 8(8), added pars. (10) and (11). Former pars. (10) and (11) redesignated (8) and (9), respectively. Par. (12). Pub. L. 111–67, § 8(9), substituted “base” for “capacity”. Par. (14). Pub. L. 111–67, § 8(10), substituted “military or critical infrastructure assistance to any foreign nation, homeland security” for “military assistance to any foreign nation”. Par. (16). Pub. L. 111–67, § 8(11), added subpars. (C) and (D). Par. (18). Pub. L. 111–67, § 8(2), struck out par. (18). Text read as follows: “The term ‘small business concern owned and controlled by socially and economically disadvantaged individuals’ has the same meaning as in section 637(d)(3)(C) of title 15.” 2003—Pars. (3) to (13). Pub. L. 108–195, § 5(1), (2), added par. (3) and redesignated former pars. (3) to (12) as (4) to (13), respectively. Former par. (13) redesignated (14). Par. (14). Pub. L. 108–195, § 5(1), (3), redesignated par. (13) as (14) and inserted “and critical infrastructure protection and restoration” before period at end of last sentence. Former par. (14) redesignated (15). Pars. (15) to (18). Pub. L. 108–195, § 5(1), redesignated pars. (14) to (17) as (15) to (18), respectively. 1994—Par. (13). Pub. L. 103–337 inserted at end “Such term includes emergency preparedness activities conducted pursuant to title VI of The Robert T. Stafford Disaster Relief and Emergency Assistance Act.” 1992—Pub. L. 102–558 amended section generally, substituting present provisions for provisions defining terms “person”, “materials”, “facilities”, “national defense”, “wages, salaries, and other compensation”, and “defense contractor”. 1970—Subsec. (d). Pub. L. 91–379, § 102(1), inserted reference to space in definition of national defense. Subsec. (f). Pub. L. 91–379, § 102(2), added subsec. (f). 1953—Subsec. (d). Act June 30, 1953, amended subsec. (d) generally which, among other changes, inserted references to

Construction

, military assistance to foreign nations and stockpiling, and struck out specific reference to “operations or activities in connection with the Mutual Defense Assistance Act of 1949, as amended”.

Statutory Notes and Related Subsidiaries

Effective Date

of 1992 AmendmentAmendment by Pub. L. 102–558 deemed to have become effective Mar. 1, 1992, see section 304 of Pub. L. 102–558, set out as a note under section 4502 of this title.

Reference

Citations & Metadata

Citation

50 U.S.C. § 4552

Title 50War and National Defense

Last Updated

Apr 6, 2026

Release point: 119-73