; or (B) in the case of a 2nd or subsequent violation, subject the person to a civil money penalty of not more than $5,000; and (2) in the case of any violation, notify the person of the prohibitions set forth in section 922(d)(10). . (c) Prohibition Section 922(d) of such title is amended in the 1st sentence— (1) in paragraph (10), by striking or at the end; (2) in paragraph (11), by striking the period and inserting ; or ; and (3) by adding at the end the following: (12) has been assessed a civil money penalty for a violation of subsection (z)(4) within the preceding 5 years. . (d) Regulations Within 6 months after the date of the enactment of this Act, the Attorney General shall promulgate such rules as are necessary to ensure that— (1) the national instant criminal background check system established under section 103 of the Brady Handgun Violence Prevention Act denies the transfer of a firearm to a person who has been assessed a civil money penalty for a violation of section 922(z)(4) of title 18, United States Code, in the 5-year period ending with the date of the proposed transfer