The activity of the referees rituals has nature jurisdiction and replacement of the function of the judge ordinary (both it is true that to establish if a dispute belt to the cognition of the first or of the second si configure as question of competence). Noun . e the arbitrator, like the judge, can proceed to relief ex officio of the nullity of the contract and this is it is allowed in all the hypothesis appeal negotiation and if the invalidity found is different by the one proposed by parts, with only .