On the legal consequences of brexit

Introduction: one of the most important functioning aspects of modern regional international organizations is the institution of state membership. For the European Union, this issue has until recently been considered in terms of the ongoing process of developing European integration and expanding the membership of States in this international organization. In 2016, the UK held a referendum on its leaving the EU, whose positive result gave rise to the process of leaving the EU - Brexit. Brexit has produced a number of consequences, some of which will be analyzed in this paper. The aim of the study is to investigate and analyze some of the legal consequences of Brexit. Methods: in the course of the research both general scientific methods of cognition and specific legal methods (formal-legal, historical-legal) were used. Results: the paper proves that Brexit is a unique case in the practice of both the European Union and the international practice of interaction between States and international organizations. The author found that the UK’s leaving the EU entails a number of consequences, which are extremely difficult to identify, since they are very diverse and relate to completely different spheres of public relations: peace, security, economy, migration, Northern Ireland, and etc. Conclusions: Brexit becomes a process of testing completely new mechanisms and procedures that will have a significant impact both at the international legal level and at the domestic level. Today, Brexit requires careful legal support, as it directly affects the rights and freedoms, first of all, of citizens on both sides. Without a properly executed international treaty, Brexit could become a threat not only to the economic sphere, but even to peace and security in the region.