; and (3) by adding at the end the following: (D) 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: (36) The term ‘straw purchase’ means the purchase of a firearm by an individual who conceals, or intends to conceal, 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. (37) The term ‘straw purchaser’ means a person engaged in a straw purchase. (38) 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), 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 hearing— (i) suspend for not more than 6 months, or revoke, the license under which the firearms transfer involved was conducted