2016—Pub. L. 114–328 amended section generally. Prior to amendment, text read as follows: “Any person subject to this chapter who fights or promotes, or is concerned in or connives at fighting a duel, or who, having knowledge of a challenge sent or about to be sent, fails to report the facts promptly to the proper authority, shall be punished as a court-martial may direct.”

Amendment by Pub. L. 114–328 effective on Jan. 1, 2019, as designated by the President, with implementing regulations and provisions relating to applicability to various situations, see section 5542 of Pub. L. 114–328 and Ex. Ord. No. 13825, set out as notes under section 801 of this title.