United Nations System
There are 15 members of the Security Council, consisting of five veto-wielding permanent members (China, France, Russia, the United Kingdom, and the United States) and 10 elected non-permanent members with two-year terms. This basic structure is set out in Chapter V of the UN Charter. Security Council members must always be present at UN headquarters in New York so that the Security Council can meet at any time.
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).