Title 50 › CHAPTER 55 — DEFENSE PRODUCTION › SUBCHAPTER III — GENERAL PROVISIONS › § 4552
Gives short, clear meanings for important words used in the chapter about national defense, critical supplies, and who counts as domestic or foreign sources. It defines: critical component — parts, subsystems, tooling, or test gear the President says are essential to national security, including items found critical by a National Security Assessment under 10 U.S.C. 113(i) or by a Presidential decision after a petition under 19 U.S.C. 1862 unless the President decides otherwise; critical infrastructure — physical or cyber systems so important that damage would hurt national security, the economy, or public health and safety; critical technology — any technology the President says is essential to defense; critical technology item — materials that use or come from a critical technology; defense contractor — anyone who contracts with the U.S. to supply materials, industrial resources, critical technology, or services for national defense; domestic industrial base — domestic sources that supply or are expected to supply materials or services for defense in peace, emergency, or war; domestic source — a business that does most R&D, engineering, manufacturing, and buys most components in the United States or Canada (and for subchapter II may include Australia or the United Kingdom with limits) and the special rules and limits for using Australia/UK firms for certain national defense matters (as defined by 10 U.S.C. 301 or 50 U.S.C. 98h–1(f)); facilities — buildings, structures, or improvements (excluding farms, places of worship, and private homes) and related services; foreign source — any business that is not a domestic source; guaranteeing agency — a U.S. department or agency that buys for national defense; homeland security — efforts to prevent terrorist attacks, reduce vulnerability to terrorism, limit damage from attacks, and recover from attacks; industrial resources — the materials, services, processes, and equipment needed to keep a strong defense industrial base; materials — raw materials, commodities, parts (including critical components), products, supply items, and technical information or services tied to those items; national defense — programs for military and energy production or construction, military or critical infrastructure aid to other nations, homeland security, stockpiling, space, and related activities, and it includes emergency preparedness under 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; person — an individual, company, group, or a State or local government or agency; services — work needed for making or using industrial resources or critical technology items, building facilities, moving people or goods by any civil transportation, or other defense programs; small business concern — a business that meets the rules in 15 U.S.C. 632(a) and its regulations, including socially or economically disadvantaged and women-owned small businesses.
Full Legal Text
War and National Defense, Source: USLM XML via OLRC
Legislative History
Reference
Citation
50 U.S.C. § 4552
Title 50, War and National Defense
Last Updated
Sep 22, 2026
Release point: 119-110