; and (2) in subsection (d)(1), by striking willful and inserting knowing . 23. Civil enforcement (a) Fines for engaging in the business without a license Section 924(n), of title 18, United States Code, is amended— (1) by inserting (1) after (n) ; and (2) by adding at the end the following: (2) In the case of a person who the Attorney General has found to be engaged in conduct that constitutes a violation of section 922(a)(1)(A), the Attorney General shall transmit to the persona written notice specifying the violation, which shall include a copy of the provision of law violated, and impose a civil money penalty in an amount that is not less than $2,500 and not more than $20,000. . (b) Tiered penalties for repeated violations of regulations by licensed dealers Section 924 of such title is amended by adding at the end the following: (q) Penalties relating to violations of regulations by licensed dealers (1) In the case of a licensed dealer who the Attorney General has found to be in violation of a regulation prescribed under section 926, the Attorney General shall— (A) if the violation is not a result of gross negligence by the licensed dealer— (i) in the case of the 1st such violation by the licensed dealer, if not preceded by a violation to which subparagraph (B) applies, transmit to the licensed dealer a written notice specifying the violation, which shall include a copy of the provision of law or regulation violated and a plan for how to cure the violation; (ii) in the case of the 2nd such violation by the licensed dealer, if not preceded by a violation to which subparagraph (B) applies, impose a civil money penalty in an amount that is not less than $2,500 and not more than $20,000; (iii) in the case of the 3rd such violation by the licensed dealer, if not preceded by a violation to which subparagraph (B) applies, suspend the license to deal in firearms issued to the licensed dealer under this chapter until the violation ceases