Legally speaking, an international organization must be established by a treaty providing it with legal personality for it to be an international organization. International organizations so established are subjects of international law, capable of entering into agreements among themselves or with states. Thus international organizations in a legal sense are distinguished from mere groupings of states, such as the G-8? and the G-77?, neither of which have been founded by treaty, though in non-legal contexts these are sometimes refered to as international organizations as well. International organizations must also be distinguished from treaties; while all international organizations are founded on a treaty, many treaties (e.g. NAFTA?) do not establish an international organization, and rely purely on the parties for their administration.
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