United Nations Secretary-General selection it would increase the concentration of power in the United Nations. The office is subject to a term limit of two full terms. U Thant served three terms, but his first two terms were partial terms that added up to one full term. In 1981, China cast 16 vetoes against Kurt Waldheim's selection for a third term, and Waldheim eventually suspended his candidacy. Since 1981, no Secretary-General has attempted to run for a third term. The office of Secretary-General is rotated among the regional groups of the UN. Each region gets two or three consecutive terms as Secretary-General. Candidates from
Under-Secretary-General of the United Nations diplomatic immunity under the UN Charter. The majority of USGs are appointed by the UN General Assembly on the recommendation of the Secretary-General for a fixed term of four years. Others (normally special envoys, Secretariat-appointees and non-programme management positions) are appointed directly by the UN Secretary-General on his own authority. However, all USGs report to the UN General Assembly through the UN Secretary-General. The only exception to this is the Under-Secretary-General for Internal Oversight Services who reports directly to the General Assembly. The distinction in method of appointment is important as USGs appointed by the General Assembly have a mandate