Incidental emergency relief action to the public-interest civil action pending in Rondônia seeking to prevent the enforcement of negotiable instruments in the State of São Paulo, which secured the financing of the construction of the hydroelectric power plant whose rupture caused environmental damage. Conflict of jurisdiction between state courts. Dismissal of the emergency relief action due to the supervening establishment of the arbitral tribunal, which becomes competent to rule on the emergency relief concerning the appropriateness of maintaining the enforcement proceedings. Consequent loss of subject matter of the conflict of jurisdiction between the state courts: