BRICS plays a key role as a platform for strengthening international cooperation in the context of global crises, where issues of legal regulation of interstate relations are gaining new relevance. As an association of large developing economies, BRICS focuses on equal dialogue, sustainable development and countering unilateral sanctions and economic restrictions and legal interaction. The strategic approach of the organization is based on the promotion of multipolarity, the protection of cultural sovereignty and the rejection of any form of discrimination or external dictate, which allows the BRICS to act as a counterweight to Western-centric models of global governance. It is the creation of new alliances and attempts to expand the importance of existing inter-state mechanisms that bring to the surface issues of improving the formats of international cooperation, and BRICS is one of the key options for multilateral cooperation aimed at forming its own model of interaction. The conclusions are proposed that the increasing influence of the system of geopolitical factors stimulate the need to develop new legal methods, approaches and tools within the framework of the security strategy when developing new BRICS priorities. The results of this study contribute to the development of theoretical and practical foundations in the perspective of legal regulation of international relations.