; and (3) by adding at the end the following: (E) a unique certification number has been issued to the transferor under section 923(m)(1)(E)(iv) and has not expired, and the transferor has validated that number with the system. . 3. Definitions Section 921(a) of title 18, United States Code, is amended by adding at the end the following: (38) The term straw purchase means the purchase of a firearm by an individual who conceals, or intends to conceal, from any entity that the purchase is being made on behalf of a third party who is identified or not yet identified. The term shall not include a bona fide gift to a person who is not prohibited by law from possessing or receiving a firearm. For purposes of the preceding sentence, a gift to a person is not a bona fide gift if the person has offered or given the purchaser a service or thing of value to acquire the firearm for the person. (39) The term straw purchaser means a person engaged in a straw purchase. (40) The term gun trafficking means the knowing acquisition, transfer, or attempted acquisition or transfer of a firearm for purposes of unlawful commerce by a licensed or unlicensed person. . 4. Penalties Section 924 of title 18, United States Code, is amended by adding at the end the following: (q) (1) With respect to each violation of subparagraph (A), (B), or (C) of section 923(m)(2), a person shall be fined under this title, imprisoned not more than 18 months, or both. (2) With respect to each violation of section 923(m)(2)(D), a person shall be fined not more than $2,500, imprisoned not more than 1 year, or both. (3) With respect to each violation of paragraph (1)(G) or (3)(B) of section 923(m), and with respect to each violation or related series of violations of section 923(m)(5)(A) that occurs on the same date, a licenced importer, licensed manufacturer, or licensed dealer shall be fined not more than $500. (4) (A) With respect to each violation of paragraph (1)(H) or (2)(E) of section 923(m), the Attorney General shall, after notice and opportunity for