; and (B) interest on any such amounts (at a rate determined by the Commission). (2) Other action not precluded Any action by the Commission in accordance with this subsection shall not preclude enforcement proceedings by the Commission in accordance with section 309(a), including a referral by the Commission to the Attorney General in the case of an apparent knowing and willful violation of this title. . 103. Prohibition on joint fundraising committees Section 302(e) of the Federal Election Campaign Act of 1971 ( 52 U.S.C. 30102(e) ) is amended by adding at the end the following new paragraph: (6) No authorized committee of a participating candidate (as defined in section 501) may establish a joint fundraising committee with a political committee other than an authorized committee of a candidate. . 104. Exception to limitation on coordinated expenditures by political party committees with participating candidates Section 315(d) of the Federal Election Campaign Act of 1971 ( 52 U.S.C. 30116(d) ) is amended— (1) in paragraph (3)(A), by striking in the case of and inserting except as provided in paragraph (5), in the case of