; and (iii) the amount of such inactivity fee. (c) Right To not accept large bills (1) In general Notwithstanding subsection (a), for the 5-year period beginning on the date of enactment of this section, this section shall not require a person to accept cash payments in $50 bills or any larger bill. (2) Rulemaking (A) In general The Secretary shall issue a rule on the date that is 5 years after the date of the enactment of this section with respect to any bill denominations a person is not required to accept. (B) Requirement When issuing a rule under subparagraph (A), the Secretary shall require persons to accept $1, $5, $10 and $20 bills. (d) Enforcement (1) Preventative relief (A) In general Whenever any person has engaged, or there are reasonable grounds to believe that any person is about to engage, in any act or practice prohibited by this section, any customer or prospective customer of such person aggrieved by such violation or threatened violation may deliver to the retailer, or cause to be so delivered by certified mail, with proof of delivery, a notice describing, in reasonable detail, the conduct or events constituting the violation or threatened violation, and giving notice that, unless such conduct is corrected or cured within 45 days after the date of delivery of such notice, a civil action for preventative relief, including an application for a permanent or temporary injunction, restraining order, or other appropriate such relief, which may include a civil penalty under paragraph (2), may be brought against such person. (B) No violation If, within the 45-day period under subparagraph (A), the retailer establishes to the reasonable satisfaction of the customer, in a response provided in writing to the customer, that no violation occurred as alleged, or certifies that the violation alleged has been corrected or cured, and provides reasonable assurance that no such violation will be permitted to occur, no further proceedings under this section shall be undertaken. (C) Failure to respond If a retailer,