This chapter considers what Russian legislation, judicial practice, and doctrinal views regulate the conclusion, ratification, entry into force, or termination of treaties under Russian law. In other words, it asks how Russian law interacts with and/or implements the international law of treaties. Here, the sources of Russian law generally are also the sources of Russian foreign relations law, including the Russian law of treaties. The latter refers to a body of legislation, judicial practice, and doctrinal literature which determines how treaties are to be concluded, ratified, confirmed, approved, or provisionally applied by relevant State agencies, terminated, denounced, or suspended if necessary, and otherwise procedurally dealt with under Russian law. Furthermore, as the chapter shows, the sources of the Russian law of treaties are also the same sources of other branches or rules of Russian law.