; (B) the transfer to or purchase by the United States, a department or agency of the United States, a State, or a department, agency, or political subdivision of a State, of a firearm; (C) the transfer to or purchase by a law enforcement officer employed by an entity referred to in subparagraph (B) of a firearm for law enforcement purposes (whether on or off duty); (D) the transfer to or purchase by a campus law enforcement officer of a firearm for law enforcement purposes (whether on or off duty); (E) the transfer to or purchase by a rail police officer employed by a rail carrier and certified or commissioned as a police officer under the laws of a State of a firearm for law enforcement purposes (whether on or off duty); or (F) the transfer or purchase of a firearm listed as a curio or relic by the Attorney General pursuant to section 921(a)(13). (4) Definition For purposes of paragraph (3)(D), the term campus law enforcement officer means an individual who is— (A) employed by a private institution of higher education that is eligible for funding under title IV of the Higher Education Act of 1965 ( 20 U.S.C. 1070 et seq. ); (B) responsible for the prevention or investigation of crime involving injury to persons or property, including apprehension or detention of persons for such crimes; (C) authorized by Federal, State, or local law to carry a firearm, execute search warrants, and make arrests; and (D) recognized, commissioned, or certified by a government entity as a law enforcement officer. . (b) Penalties Section 924(a)(2) of title 18, United States Code, as amended by section 517 of this Act, is amended by striking or (dd) and inserting (dd), or (ff) . (c) Conforming amendments Chapter 44 of title 18, United States Code, is amended— (1) in section 922(s), as so redesignated by section 201 of this Act and as amended by section 202 of this Act— (A) in paragraph (1)— (i) in subparagraph (C)(ii), by striking (g) or (n) and inserting (g), (n), or (ee)(2)