; or (B) possess a large capacity ammunition feeding device manufactured after the date of enactment of this subsection. (2) It shall be unlawful for any person who lawfully owns or possesses a large capacity ammunition feeding device that was manufactured and purchased or transferred before such date of enactment to transfer, in or affecting interstate or foreign commerce, such device after the date of enactment of this subsection. (3) This subsection shall not apply with respect to— (A) the importation for, manufacture for, sale to, transfer to, or possession by or under the authority of, the United States or any department or agency thereof or a State or Tribe, or a department, agency, or political subdivision thereof; or (B) the importation or manufacture for, sale or transfer to, or possession by, a licensee under title I of the Atomic Energy Act of 1954 ( 42 U.S.C. 2011 et seq. ) for purposes of establishing and maintaining an on-site physical security protection system and security organization required by Federal law, or the transfer to, or possession by, a contractor of such a licensee on-site for such purposes or off-site for purposes of licensee-authorized training or transportation of nuclear materials. (4) Any licensed importer, licensed manufacturer, or other person in possession of a large capacity ammunition feeding device— (A) shall mark such large capacity ammunition feeding device imported or manufactured under subparagraph (A) or (B) of paragraph (3) after the date of enactment of this subsection in the manner prescribed by the Attorney General before any transfer under subparagraph (A) or (B) of paragraph (3)