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Title 50, War and National DefenseRelease 119-102

§47f Definitions

Title 50 › CHAPTER 4C — ATOMIC WEAPONS AND SPECIAL NUCLEAR MATERIALS INFORMATION REWARDS › § 47f

Last updated Aug 21, 2026|Official source

Summary

Defines four key words used here. Atomic energy means the energy given off by nuclear fission or other nuclear change. Atomic weapon means any device that uses atomic energy and is mainly meant to be a weapon, a weapon prototype, or a test device; parts used only to carry or move the device are not included if they can be separated. Special nuclear material means plutonium, uranium enriched in isotope 233 or 235, or any other material made special under the Atomic Energy Act of 1954 [42 U.S.C. 2011 et seq.]. “United States” in a geographic sense includes Puerto Rico, all U.S. territories and possessions, and the Canal Zone, except that for section 47c the meaning comes from the Immigration and Nationality Act [8 U.S.C. 1101 et seq.].

Full Legal Text

Title 50, §47f

War and National Defense, Source: USLM XML via OLRC

As used in this chapter—
(a)The term “atomic energy” means all forms of energy released in the course of nuclear fission or nuclear transformation.
(b)The term “atomic weapon” means any device utilizing atomic energy, exclusive of the means for transporting or propelling the device (where such means is a separable and divisible part of the device), the principal purpose of which is for use as, or for development of, a weapon, a weapon prototype, or a weapon test device.
(c)The term “special nuclear material” means plutonium, or uranium enriched in the isotope 233 or in the isotope 235, or any other material which is found to be special nuclear material pursuant to the provisions of the Atomic Energy Act of 1954 [42 U.S.C. 2011 et seq.].
(d)The term “United States,” when used in a geographical sense, includes Puerto Rico, all Territories and possessions of the United States and the Canal Zone; except that in section 47c of this title, the term “United States” when so used shall have the meaning given to it in the Immigration and Nationality Act [8 U.S.C. 1101 et seq.].

Legislative History

Notes & Related Subsidiaries

Editorial Notes

References in Text

The Atomic Energy Act of 1954, referred to in subsec. (c), is act Aug. 1, 1946, ch. 724, as added by act Aug. 30, 1954, ch. 1073, § 1, 68 Stat. 919, which is classified principally to chapter 23 (§ 2011 et seq.) 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 2011 of Title 42 and Tables. The Immigration and Nationality Act, referred to in subsec. (d), is act June 27, 1952, ch. 477, 66 Stat. 163, which is classified principally to chapter 12 (§ 1101 et seq.) of Title 8, Aliens and Nationality. For complete classification of this Act to the Code, see

Short Title

note set out under section 1101 of Title 8 and Tables.

Reference

Citations & Metadata

Citation

50 U.S.C. § 47f

Title 50, War and National Defense

Last Updated

Aug 21, 2026

Release point: 119-102