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.
United Nations Economic and Social Council
The United Nations Economic and Social Council (ECOSOC; , ) is one of the six principal organs of the United Nations, responsible for coordinating the economic, social, and related work of 15 UN specialized agencies, their functional commissions and five regional commissions. The ECOSOC has 54 members. The General Assembly selects 18 new members for ECOSOC each year for the term of 3 years with a provision that a retiring member can be re-elected. It holds one seven-week session each year in July, and since 1998, it has also held an annual meeting in April with finance ministers heading key committees of the World Bank and the International Monetary Fund (IMF).