; . (b) Effective date The amendments made by this section shall apply with respect to communications made on or after the date of the enactment of this Act. 6. Disclosure of true identity of source of funding of campaign advertisements (a) Requiring best efforts To determine true source of funds used To pay for campaign advertisements Section 318 of the Federal Election Campaign Act of 1971 ( 52 U.S.C. 30120 ) is amended by adding at the end the following new subsection: (e) Requiring best efforts To determine true source of funds used To pay for certain advertisements (1) Best efforts required The person making a disbursement of funds for a communication described in paragraph (3) of subsection (a) shall make best efforts to determine the true source of the funds used for the disbursement to ensure that the names of the persons included in the statement required under such paragraph are the names of the persons who served as the true source of such funds. For purposes of this paragraph, such best efforts shall include the making of multiple requests (if necessary) to contributors to determine whether the funds provided by the contributors were transferred (either directly or indirectly) by other persons. (2) Treatment of political committees For purposes of this subsection, a political committee shall not be considered a source of funds used for a disbursement for a communication described in paragraph (3) of subsection (a), other than an account of a political committee established for the purpose of accepting donations or contributions that do not comply with the contribution limits or source prohibitions under this Act. . (b) Inclusion in advertisements of identification of Top Three Funders Section 318 of such Act ( 52 U.S.C. 30120 ), as amended by subsection (a), is further amended by adding at the end the following new subsection: (f) Disclosure of Top Three Funders (1) Requiring disclosure in certain advertisements (A) Requirement Any communication described in paragraph (3) of subsection (a), shall, in