31 C.F.R. § 540.306 Highly Enriched Uranium (HEU).
Title 31 - Money and Finance: Treasury
The term highly enriched uranium or HEU means uranium enriched to twenty (20) percent or greater in the isotope U235.
Title 31: Money and Finance: Treasury
PART 540—HIGHLY ENRICHED URANIUM (HEU) AGREEMENT ASSETS CONTROL REGULATIONS
Subpart C—General Definitions
§ 540.306 Highly Enriched Uranium (HEU).
