Us Code § 3039 - Assistance to United States law enforcement agencies

Full text of Us Code United States Code § 3039 — Assistance to United States law enforcement agencies, with citation guidance and answers to common questions.

§ 3039. Assistance to United States law enforcement agencies

(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.

(July 26, 1947, ch. 343, title I, §105A, as added Pub. L. 104–293, title VIII, §814(a), Oct. 11, 1996, 110 Stat. 3483; amended Pub. L. 108–136, div. A, title IX, §921(e)(3), Nov. 24, 2003, 117 Stat. 1569.)


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".

About This Section

50 U.S.C. § 3039 is part of Title 50 of the United States Code. The United States Code is the official codification of federal statutes maintained by the Office of the Law Revision Counsel of the U.S. House of Representatives. Congress amends the Code through new public laws, which are eventually incorporated into the relevant title.

This section may be cited in legal writing as 50 U.S.C. § 3039. For the most current official text, including any recent amendments, use the official source links below. Do not rely on this page as the sole authority for legal citation or litigation.

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Sources

Source: official Us Code text · Last verified 2026-08-27

Frequently Asked Questions About Us Code § 3039

What does United States Code § 3039 cover?

Section 3039 ("Assistance to United States law enforcement agencies") is part of the United States Code, the codified statutory law of Us Code. It sets out the legal rule or procedure described in the text above. Statutes are amended regularly, so always verify against the official source.

How do I cite Us Code § 3039?

A common citation format is "United States Code § 3039" (Us Code). Legal writing may require the code abbreviation, section number, and year or edition. Match the style required by your court, professor, or publisher.

Is this the official text of Us Code law?

No. This page is for research and education and may not include the most recent amendments. For official current law, check the Us Code official source linked on this page or consult a licensed Us Code attorney.

How does Us Code § 3039 apply to my situation?

Statutes are interpreted in context, and application depends on your specific facts. Only a licensed attorney in Us Code can advise on how this section applies to you. Contact your state or local bar association for a referral.

Sources & Verification

Not legal advice. Verify against the official source and consult a licensed attorney in Us Code.