The idea of international arbitration tribunals that use several instruments of international law institutes a “non-governmental” approach to settling private-law disputes (in addition to the perceptibleness of settlement, which may be negotiated outside arbitration proceedings). From the constitutional viewpoint, such an approach relinquishes, to some extent, the right to resort to general courts of law, the principle of fair trial and, to some extent, the principle of appeal. All these factors correspond, more or less, to the organizational and procedural aspects of constitutional law. From the viewpoint of constitutional law, it is difficult to perceive the effects of this agreement as “a derogation of the jurisdiction of the Constitutional Court”. More precisely, the issue concerns the lawful use of the arbitration authority of public power with regard to a subject of private law with the possibility (albeit limited) to have the matter “returned” for review by a general court of law.