欧佩克组织条例规定:“在根本利益上与各成员国相一致、确实可实现原油净出口的任何国家,在为全权成员国的三分之二多数接纳,并为所有创始成员国一致接纳后,可成为本组织的全权成员国。”该组织条例进一步区分了3类成员国的范畴:创始成员国——1960年9月出席在伊拉克首都巴格达举行的欧佩克第一次会议, The OPEC Constitution states: “Any country that, in its fundamental interest, is consistent with its member states and can indeed achieve a net export of crude oil, is accepted by a two-thirds majority of the totaling member states and is unanimously accepted by all founding member states After which it could become a fully-fledged member of the Organization. ”" The Organizational Regulation further distinguishes between the three categories of Member States: Founding Member States - At the first OPEC meeting in Baghdad, capital of Iraq, in September 1960,