Pub. L. 83-665, tit. V, ch. 2, sec. 526
Missions and Staffs Abroad.—
Sec. 526. Missions and Staffs Abroad.— The President may maintain special missions or staffs abroad in such nations and for such periods of time as may be necessary to carry out this Act. Each such special mission or staff shall be under the direction of a chief. The chief and his deputy shall be appointed by the President and may, notwithstanding any other law, be removed by the President at his discretion. The chief shall be entitled to receive (1) in cases approved by the President, the same compensation and allowances as a chief of mission, class 3, or a chief of mission, class 4, within the meaning of the Foreign Service Act of 1946 (22 U. S. C. 801), or (2) compensation and allowances in accordance with section 527 (c) of this Act, as the President shall determine to be appropriate.