; (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; (iv) in the case of the 4th such violation by the licensed dealer, whether or not preceded by a violation to which subparagraph (B) applies, revoke the license; or (v) in the case of any such violation by the licensed dealer, if preceded by a violation to which subparagraph (B) applies, apply the penalty authorized under this subsection that is 1 level greater in severity than the level of severity of the penalty most recently applied to the licensed dealer under this subsection; or (B) if the violation is a result of such gross negligence— (i) in the case of the 1st such violation by the licensed dealer, impose a civil money penalty in an amount that is not less than $2,500 and not more than $20,000; (ii) in the case of the 2nd such violation by the licensed dealer— (I) impose a civil money penalty in an amount equal to $20,000; (II) suspend the license to deal in firearms issued to the licensed dealer under this chapter until the violation ceases; or (III) revoke the license