Legality and legitimacy of domestic court decision as a source of International Law-making

This article will explore the possibility of domestic judicial decisions as a source for international law-making. Considering the contemporary pattern of international law development, which is no longer state-centred, this possibility is quite plausible. In addition to examining legality, it is necessary to examine the legitimacy element to ensure that the acceptance of domestic court decisions as a source of international law-making is legitimate. This study discovered that the legal foundation of international law implicitly delegated the domestic courts to make international law. Domestic court rulings that reflect universal principles such as humanity, security, and peace will be generally considered a source of international law-making. As a result, the fulfilled element of legitimacy exists within the context of teleology.