Arctic legal system is one of the best theoretical and practical case studies of the international law for the non-states territories. It is based on a framework of the broader general binding regulation of the international law like UNCLOS or the international environmental law treaties, but it is not sufficient nowadays. The current Arctic confronts many fast changes in its ecosystem, environment and society and these changes need to be reflected in the future working Arctic legal system which should stand on new-developing flexible multilevel governance of international and regional co-operation and soft law instruments.