Pub. L. 92-352, tit. I, sec. 107
ambassadors and ministers
ambassadors and ministers Sec. 107. Section 501 of the Foreign Service Act of 1946 (22 U.S.C. 901) is amended by adding at the end thereof the following new subsection: “(c) On and after the date of enactment of the Foreign Relations Authorization Act of 1972, no person shall be designated as ambassador or minister, or be designated to serve in any position with the title of ambassador or minister, unless that person is appointed as an ambassador or minister in accordance with subsection (a) of this section or clause 3, section 2, of article II of the Constitution, relating to recess appointments, except that the personal rank of ambassador or minister may be conferred by the President in connection with special missions for the President of an essentially limited and temporary nature of not exceeding six months.”