Title 50, War and National DefenseRelease 119-110

§3039 Assistance to United States Law Enforcement Agencies

Title 50 › CHAPTER 44 — NATIONAL SECURITY › SUBCHAPTER I — COORDINATION FOR NATIONAL SECURITY › § 3039

Last updated Sep 22, 2026|Official source

Summary

Intelligence agencies may, when a United States law enforcement agency asks, collect information outside the United States about people who are not United States persons. They may do this even if the law enforcement agency plans to use the information for a law enforcement or counterintelligence investigation. For the Department of Defense, only four agencies may help: the National Security Agency, the National Reconnaissance Office, the National Geospatial-Intelligence Agency, and the Defense Intelligence Agency. DoD help cannot include an Army, Navy, Air Force, or Marine Corps member directly taking part in an arrest or similar action. Help cannot be given if it would hurt military readiness. The Secretary of Defense must create rules for how DoD agencies use this authority and protect sources and methods. The Attorney General names which federal departments count as a United States law enforcement agency. "United States person" means (A) a U.S. citizen, (B) a known permanent resident alien, (C) an unincorporated group mostly made up of U.S. citizens or permanent residents, and (D) a corporation incorporated in the United States unless it is directed and controlled by a foreign government.

Full Legal Text

Title 50, §3039

War and National Defense, Source: USLM XML via OLRC

(a)Authority to provide assistance
Subject to subsection (b), elements of the intelligence community may, upon the request of a United States law enforcement agency, collect information outside the United States about individuals who are not United States persons. Such elements may collect such information notwithstanding that the law enforcement agency intends to use the information collected for purposes of a law enforcement investigation or counterintelligence investigation.
(b)Limitation on assistance by elements of Department of Defense
(1)With respect to elements within the Department of Defense, the authority in subsection (a) applies only to the following:
(A)The National Security Agency.
(B)The National Reconnaissance Office.
(C)The National Geospatial-Intelligence Agency.
(D)The Defense Intelligence Agency.
(2)Assistance provided under this section by elements of the Department of Defense may not include the direct participation of a member of the Army, Navy, Air Force, or Marine Corps in an arrest or similar activity.
(3)Assistance may not be provided under this section by an element of the Department of Defense if the provision of such assistance will adversely affect the military preparedness of the United States.
(4)The Secretary of Defense shall prescribe regulations governing the exercise of authority under this section by elements of the Department of Defense, including regulations relating to the protection of sources and methods in the exercise of such authority.
(c)Definitions
For purposes of subsection (a):
(1)The term “United States law enforcement agency” means any department or agency of the Federal Government that the Attorney General designates as law enforcement agency for purposes of this section.
(2)The term “United States person” means the following:
(A)A United States citizen.
(B)An alien known by the intelligence agency concerned to be a permanent resident alien.
(C)An unincorporated association substantially composed of United States citizens or permanent resident aliens.
(D)A corporation incorporated in the United States, except for a corporation directed and controlled by a foreign government or governments.

Legislative History

Notes & Related Subsidiaries

Editorial Notes

Codification Section was formerly classified to section 403–5a of this title prior to editorial reclassification and renumbering as this section.

Amendments

2003—Subsec. (b)(1)(C). Pub. L. 108–136 substituted “National Geospatial-Intelligence Agency” for “National Imagery and Mapping Agency”.

Reference

Citations & Metadata

Citation

50 U.S.C. § 3039

Title 50, War and National Defense

Last Updated

Sep 22, 2026

Release point: 119-110