; or (B) a candidate otherwise fails to comply with the requirements of this title, including any regulatory requirements prescribed by the Commission. (2) Repayment of benefits If certification is revoked under paragraph (1), the candidate shall repay to the Empowering Citizens Payment Account of the Presidential Election Campaign Fund (established under section 9051 of the Internal Revenue Code of 1986) an amount equal to the value of benefits received under this title with respect to the election cycle involved plus interest (at a rate determined by the Commission) on any such amount received. (c) Participating Candidate defined In this title, a participating candidate means a candidate for the office of Senator or Representative in, or Delegate or Resident Commissioner to, the Congress who is certified under this section as eligible to receive benefits under this title. C Requirements for Candidates Certified as Participating Candidates 521. Restrictions on certain contributions and expenditures (a) Reduction in otherwise applicable contribution limits (1) In general In the case of a candidate who is certified as a participating candidate under this title with respect to an election, each limit applicable under paragraph (1)(A) and paragraph (2)(A) of section 315(a) to the amount of a contribution which may be made to the candidate and any authorized committee of the candidate with respect to the election shall be equal to $1,000 for the election. (2) Inflation adjustment In each odd-numbered calendar year after 2018— (A) the $1,000 amount under paragraph (1) shall be increased by the percent difference determined under section 315(c)(1)(A) (determined by substituting calendar year 2017 for the base period ); (B) the amount so increased shall remain in effect for the election cycle beginning on the first day following the year in which the amount is increased