This article presents an original concept of establishment of international regional law as a branch of international law at the present stage of social development. The legal system is constantly being updated with new branches and sub-branches of law, institutions, and norms, which makes it more efficient overall. The study of integrational processes in the conditions of development of geopolitical competitiveness, active formation of new regional economic, social, and military-political spaces, demands mobilization of not only political, social, and economic resources, but also legal. A complex analysis of integrational processes within the framework of current regional formations allowed the author to determine a number of signs such as fusion and interconnection of national interests, which ensures balance of national interests of the member-states of regional formation on one hand, and the interests of the regional formation itself on the other. The author substantiates the conclusion that creation and functionality of such regional formations is impossible without presence of international regional law, the element of which can possess certain level of autonomy with regards to both, national law of the member-states, as well as the international law.