a determination under section 309(a)(2) that there is reason to believe a violation of subsection (a) has occurred or is about to occur, any investigation of such alleged violation shall be limited in scope to the factual matter necessary to determine whether such alleged violation occurred. (B) Petition to quash subpoena or order on basis not limited in scope to necessary factual matter (i) In general A person subject to an investigation by the Commission following a determination of the Commission that there is reason to believe a violation of subsection (a) has occurred or is about to occur may file a petition in any United States district court with jurisdiction to quash any subpoena or order of the Commission issued under paragraph (3) or (4), respectively, of section 307(a) on the basis that the subpoena or order is not limited in scope to the factual matter necessary to determine whether such alleged violation occurred as required under subparagraph (A). (ii) Clarification Nothing in clause (i) shall be construed to alter the right of any person to otherwise challenge the power of the Commission to issue a subpoena under section 307(a)(3) or an order under section 307(a)(4). . (f) Reporting (1) Contributions and expenditures of political committees and political parties Section 304(b) of the Federal Election Campaign Act of 1971 ( 52 U.S.C. 30104(b) ) is amended by striking and at the end of paragraph (7), by striking the period at the end of paragraph (8) and inserting