In the arbitration ritual, where the parts not they have tied the referees to compliance of the rules of the code of ritual, it is at at them changes. icare ED expand the initials questions, without che find application le preclusions of to which in art. 183 cod. proc. civ., salvo respect of the principle of the contradictory, with the consequence which is they are their interdict only one true and proper modification of the facts constitutive of the right fact worth in Jun Dizio, such from introduce in the process a theme of investigation and of decision new e to be disoriented the counterpart, so vulnerararama the right of defense.