The maritime zones of the Russian Federation overlap with those of 12 neighbouring states. The practice of the Russian Federation concerning the delimitation of the boundaries of these zones provides an interesting opportunity to analyse the role of international law in the policy of a state in this respect, especially because bilateral negotiations of the Russian Federation have raised complex issues of law and fact. The analysis suggests that international law may influence the policy of a state regarding the delimitation of its maritime zones in different, albeit limited, ways. The role of international law in bilateral negotiations supports the conclusions the case law has reached on the significance of bilateral delimitation treaties for the formation of customary international law. This second part of the article analyses the Russian Federation's delimitations with Norway and the United States and the legal regime of the Caspian Sea, and draws some conclusions on the case of the Russian Federation and the relationship between state practice and international law.