After the collapse of the USSR the legal status of the Caspian Sea remains unregulated. Nevertheless, the former Soviet republics and Iran carry out research and development of the resources on the territory of the Caspian Sea. The regions economic interests are very important (it is the main forming factor for political relations around the Caspian Sea). This research analyses the rules of international law interacting with each other regarding the Caspian Sea and the validity of the international agreements concluded by the Caspian states on the Caspian Sea. The conflictual influence of...