; or (ii) in the case of any other political committee, by the treasurer of the committee. . (b) Effective date; transition for existing committees (1) In general The amendment made by subsection (a) shall apply with respect to political committees which file statements of organization under section 303 of the Federal Election Campaign Act of 1971 ( 52 U.S.C. 30103 ) on or after the date of the enactment of this Act. (2) Transition for existing committees (A) Notification by Federal Election Commission Not later than 90 days after the date of the enactment of this Act, the Federal Election Commission shall provide each political committee under such Act with the written explanation of section 319 of such Act, as required under section 303(e)(1) of such Act (as added by subsection (a)). (B) Acknowledgment by committee Not later than 30 days after receiving the written explanation under subparagraph (A), each political committee under such Act shall transmit to the Federal Election Commission the signed certification, as required under section 303(e)(2) of such Act (as added by subsection (a)).