((a)) ** Appointment of representative; rank, status, and tenure; duties** The President, by and with the advice and consent of the Senate, shall appoint a representative of the United States to the United Nations who shall have the rank and status of Ambassador Extraordinary and Plenipotentiary and shall hold office at the pleasure of the President. Such representative shall represent the United States in the Security Council of the United Nations and may serve ex officio as representative of the United States in any organ, commission, or other body of the United Nations other than specialized agencies of the United Nations, and shall perform such other functions in connection with the participation of the United States in the United Nations as the President may, from time to time, direct.

((b)) ** Appointment of additional representatives; rank, status, and tenure; duties; reappointment unnecessary** The President, by and with the advice and consent of the Senate, shall appoint additional persons with appropriate titles, rank, and status to represent the United States in the principal organs of the United Nations and in such organs, commissions, or other bodies as may be created by the United Nations with respect to nuclear energy or disarmament (control and limitation of armament). Such persons shall serve at the pleasure of the President and subject to the direction of the Representative of the United States to the United Nations. They shall, at the direction of the Representative of the United States to the United Nations, represent the United States in any organ, commission, or other body of the United Nations, including the Security Council, the Economic and Social Council, and the Trusteeship Council, and perform such other functions as the Representative of the United States is authorized to perform in connection with the participation of the United States in the United Nations. Any Deputy Representative or any other officer holding office at the time the provisions of this Act, as amended, become effective shall not be required to be reappointed by reason of the enactment of this Act, as amended.

((c)) ** Appointment of special and alternate representatives; number; senior representative; duties** The President, by and with the advice and consent of the Senate, shall designate from time to time to attend a specified session or specified sessions of the General Assembly of the United Nations not to exceed five representatives of the United States and such number of alternates as he may determine consistent with the rules of procedure of the General Assembly. One of the representatives shall be designated as the senior representative.

((d)) ** Additional appointees; conditions governing certain appointments; designation of certain State Department officers to sit on Security Council** The President may also appoint from time to time such other persons as he may deem necessary to represent the United States in organs and agencies of the United Nations. The President may, without the advice and consent of the Senate, designate any officer of the United States to act without additional compensation as the representative of the United States in either the Economic and Social Council or the Trusteeship Council (1) at any specified session thereof where the position is vacant or in the absence or disability of the regular representative or (2) in connection with a specified subject matter at any specified session of either such Council in lieu of the regular representative. The President may designate any officer of the Department of State, whose appointment is subject to confirmation by the Senate, to act, without additional compensation, for temporary periods as the representative of the United States in the Security Council of the United Nations in the absence or disability of the representatives provided for under subsections (a) and (b) or in lieu of such representatives in connection with a specified subject matter.

((e)) ** Appointment of representative to European office of United Nations; rank, status, and tenure; duties** The President, by and with the advice and consent of the Senate, shall appoint a representative of the United States to the European office of the United Nations, with appropriate rank and status who shall serve at the pleasure of the President and subject to the direction of the Secretary of State. Such person shall, at the direction of the Secretary of State, represent the United States at the European office of the United Nations, and perform such other functions there in connection with the participation of the United States in international organizations as the Secretary of State may, from time to time, direct.

((f)) ** Representation by President or Secretary of State** Nothing contained in this section shall preclude the President or the Secretary of State, at the direction of the President, from representing the United States at any meeting or session of any organ or agency of the United Nations.

((g)) ** Compensation** All persons appointed in pursuance of authority contained in this section shall receive compensation at rates determined by the President upon the basis of duties to be performed but not in excess of rates authorized by sections 3961, 3962, and 3963 of this title for chiefs of mission, members of the Senior Foreign Service, and Foreign Service officers occupying positions of equivalent importance, except that no member of the Senate or House of Representatives or officer of the United States who is designated under subsections (c) and (d) of this section as a representative of the United States or as an alternate to attend any specified session or specified sessions of the General Assembly shall be entitled to receive such compensation.

((h)) ** Appointment of representative to Vienna office of United Nations; rank, status, and tenure; duties** The President, by and with the advice and consent of the Senate, shall appoint a representative of the United States to the Vienna office of the United Nations with appropriate rank and status, who shall serve at the pleasure of the President and subject to the direction of the Secretary of State. Such individual shall, at the direction of the Secretary of State, represent the United States at the Vienna office of the United Nations and perform such other functions there in connection with the participation of the United States in international organizations as the Secretary of State from time to time may direct. The representative of the United States to the Vienna office of the United Nations shall also serve as representative of the United States to the International Atomic Energy Agency.