; and (2) 2 public debates before the general election with other participating candidates and other willing candidates seeking the same office as such candidate. 515. Certification (a) In general Not later than 5 days after a candidate for Senator files an affidavit under section 511(a)(3), the Commission shall— (1) certify whether or not the candidate is a participating candidate; and (2) notify the candidate of the Commission's determination. (b) Revocation of certification (1) In general The Commission may revoke a certification under subsection (a) if— (A) a candidate fails to qualify to appear on the ballot at any time after the date of certification; 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 Fund an amount equal to the value of benefits received under this title plus interest (at a rate determined by the Commission) on any such amount received. C Benefits 521. Benefits for participating candidates (a) In general For each election with respect to which a candidate is certified as a participating candidate, such candidate shall be entitled to— (1) an allocation from the Fund to make or obligate to make expenditures with respect to such election, as provided in section 522; (2) matching contributions, as provided in section 523