Positive conflict of jurisdiction between arbitration centers (CIESP/FIESP and CCMA-RJ) raised by means of an unnamed emergency relief before the judiciary. Preliminary injunction sought to stay both arbitration proceedings pending final judgment on the emergency relief. Presence of fumus boni iuris characterized by the existence of two arbitration proceedings concerning the same dispute and of periculum in mora due to the risk of conflicting decisions. Grant of the preliminary injunction to stay the arbitration proceedings: