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++.