; (B) in clause (i), by striking ; and and inserting a period; and (C) by striking except that and all that follows through the candidate and inserting except that the candidate ; and (2) by adding at the end the following new paragraph: (6) A political committee may not engage in joint fundraising with other political committees or with unregistered committees or organizations. . B Prohibition on the appointment of big donor ambassadors and chiefs of mission 738. Prohibition on the appointment of big donor ambassadors and chiefs of mission Section 304(a) of the Foreign Service Act of 1980 ( 22 U.S.C. 3944(a) ) is amended— (1) in paragraph (3)— (A) by inserting (A) before Contributions ; (B) by striking should not and inserting shall not ; and (C) by adding at the end the following: “The President may not appoint as chief of mission any individual who has made any contribution or bundled contribution in any amount to the political campaign of the President or an authorized committee of the President (as those terms are defined in paragraph (4)(B)(ii)). (B) An individual who would otherwise be prohibited from appointment as chief of mission under subparagraph (A) because of one or more contributions or bundled contributions may be appointed by the President if such individual receives a full refund for each such contribution or bundled contribution prior to the President providing the report required under paragraph (4). ; and (2) in paragraph (4)— (A) by inserting (A) before The President ; and (B) by adding at the end the following new subparagraph: (B) (i) The report required under subparagraph (A) shall include— (I) an explanation of the nominee’s knowledge, if applicable, of the principal language or dialect of the country in which the individual is to serve, and knowledge, if applicable, of the history, culture, economic and political institutions, and interests of that country and its people