United Nations Security Council
Along with the five permanent members, the Security Council of the United Nations has temporary members that hold their seats on a rotating basis by geographic region. Non-permanent members may be involved in global security briefings. In its first two decades, the Security Council had six non-permanent members, the first of which were Australia, Brazil, Egypt, Mexico, the Netherlands, and Poland. In 1965, the number of non-permanent members was expanded to ten.
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In practice, one candidate is chosen in private by the Security Council without discussing with member states or publishing a list of candidates. It is UN Security Council practice that the five permanent members of the Security Council – the United States, the United Kingdom, France, Russia and China – have an effective veto over the selection during this stage of the process, though this is not explicitly mentioned in the United Nations Charter. The final candidate is then submitted to the General Assembly for ratification. No candidate has ever been rejected by the General Assembly.