<![CDATA[This article examines and compares the models of regional integration adopted by the European Union (EU), the Association of Southeast Asian Nations (ASEAN), and the African Union (AU) from the perspective of the law of international organizations. The significance of this study lies in the increasingly prominent role of regional international organizations in global governance, as well as the limited number of comparative studies that simultaneously analyze these three organizations within a single systematic analytical framework. This legal scholarly article addresses two principal issues: first, a comparative analysis of the integration models of the three organizations from philosophical, legal, and institutional perspectives; and second, the implications of these differences for the development of the law of international organizations. The study employs a normative juridical method with statutory and comparative approaches, drawing upon the constituent instruments of the three organizations and relevant jurisprudence. The findings reveal that the European Union adopts a supranational model characterized by the supremacy of law, direct effect, and quasi-federal institutional arrangements. ASEAN, by contrast, adheres to an intergovernmental model founded upon the principles of non-interference and full consensus. Meanwhile, the African Union occupies a hybrid position by innovatively incorporating the principle of responsibility through the right of humanitarian intervention as enshrined in Article 4(h) of the Constitutive Act. This article concludes that there is no universally applicable model of regional sovereignty integration. Instead, the diversity of integration models reflects normative adaptations to the distinct historical, cultural, and geopolitical contexts of each region, thereby enriching the development of the law of international organizations as a whole.]]>
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