In March 2014, a historic event took place and the Crimean Peninsula became part of Russia, which significantly changed not just the life of the population of this territory, but all international relations with the participation of the Russian Federation. However, the processes associated with the complete transition of the Republic of Crimea and the city of Sevastopol to the domestic legal field have not been completed so far. In certain sectors of the economy, the deadlines for completing such transitional measures are constantly being extended. However, the religious sphere is one of those that essentially did not require significant changes. Moreover, the changes that began in Ukraine after 2014, modern scandals and harassment of religious organizations, unthinkable in Russia, only strengthen believers in the correctness of the choice made. The significance of this study is also updated by the prospect of going through the same stages of adaptation of regulatory regulation and the practice of its application in the Donetsk and Lugansk People's Republics, Zaporozhye and Kherson regions.

The purpose of this work is to compare the normative legal regulation of religious relations in Russia and Ukraine, as well as in the Republic of Crimea and the federal city of Sevastopol in order to formulate a conclusion about the degree of completion of the reintegration of the Crimean Peninsula into Russia. The objectives of this study are to study the Ukrainian legal regulation of these social relations in order to identify deviations that are unacceptable by the population of the territory under consideration, to search for similar norms in Russian legislation, to identify positive foreign experience, to identify the degree of activity of regional authorities in terms of supporting confessional and interfaith relations.

In addition to general philosophical and general scientific methods, the main method was comparative legal. In addition, the method of modeling and expert assessments was used in formulating the main author's conclusions.

The result of this study is the conclusion that the reintegration of the Crimean Peninsula into Russia in terms of the legal regulation of religious relations has not even begun, it rather continues, strengthened by the measures taken by the law-making bodies of the neighboring state. This thesis is substantiated in detail in the text of this study.