Conflict of jurisdiction between the State Common Courts and the Labor Courts to adjudicate a lawsuit for "annulment of an arbitrator's dismissal and reinstatement to the roster of an arbitration center." Arbitrator who was remunerated directly by the parties and not by the arbitration center, having entered into a franchise agreement with the arbitration center, acquired the respective shares, and participated in an arbitration course, giving rise to a legal relationship of a civil nature. Jurisdiction of the State Common Courts: