CFR > Title 31 - Money and Finance: Treasury > SUBTITLE B—Regulations Relating to Money and Finance > CHAPTER V—OFFICE OF FOREIGN ASSETS CONTROL, DEPARTMENT OF THE TREASURY (parts 501 to 598) > PART 540—HIGHLY ENRICHED URANIUM (HEU) AGREEMENT ASSETS CONTROL REGULATIONS > SUBPART C—General Definitions (§540.301 to §540.319) > 540.308—Low Enriched Uranium (LEU).

540.308—Low Enriched Uranium (LEU).

The term low enriched uranium or LEU means uranium enriched to less than twenty (20) percent in the isotope U235.