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International Acts

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Chapter Summary

Legal writers generally assume that intergovernmental organizations (IGOs)-in contradiction to States-can only enter into treaties to the extent that this is authorized in their respective constitutions. Many IGO constitutions contain provisions on specific types of treaties to be concluded by the organization with States or with other IGOs. The other types of international acts performed by IGOs are in a position parallel to that described for treaties. This chapter briefly surveys practice and customary law in respect of some of these various types of acts. According to Article 96 of the UN Charter the General Assembly and the Security Council may request the International Court of Justice to give an advisory opinion on "any legal question", which must be understood as comprising not only questions on the internal law of the organization, but also of public international law.

Keywords:advisory opinions; customary law; intergovernmental organizations (IGOs); international acts; International Court of Justice



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