The article is devoted to the examination of the formation of new vectors for international relations development within the global format of cooperation. The establishment and unification of BRICS in the international legal sphere through a wide range of common interests and views of its members towards issues facing the modern world reflect objective tendencies of world development to the formation of amultipolar international relations system and determination of particular large country actors of broad integration and having many dimensions. The authors reveal particular characteristics of the international-legal status of BRICS, which make it possible to have an effective impact on challenges facing the modern world. The legal BRICS status differs crucially from traditional legal approaches to international organizations. Acting as a special subject of world politics, creating more trusted interaction conditions, BRICS focuses its attention on the alternative world order principles within the new model of global relations. Such a format of multilateral cooperation, as well as more trusted and additional mechanisms of international interaction, gives the members an opportunity to demonstrate their geopolitical and geoeconomic world significance, and in addition their demanded humanitarian role, which, as the analysis of the mentioned actor demonstrates, is aimed at forming its own interaction model. The logic of the BRICS agenda extension to the level of an important global management system element demonstrates the goal in the field of action and, accordingly, intensive progress of humanitarian imperatives. For these humanitarian imperatives, the issues of international peacekeeping, security, protection, encouraging human rights and providing stable development are an objective necessity, especially for active demonstration of the members’ viewpoints on the international scene. For understanding the process of the alignment of international security humanitarian imperatives it is necessary to study the existing objective needs in conjunction with each country, member of BRICS.