When not have been fixed the rules procedural, the referees of the judgment arbitral can regular the procedure in the way deemed more appropriate pure because, like expressly established by art. 816-bis of the Italian Civil Code civ., is respected the principle of the contradictory and, therefore, permitted at parts the dialectt ICO performance of the respective deductions and counter -deductions, as well as the collaboration in the assessment of the facts the finding of the tests and the refutation of those opponents, thus from contribute to conviction of the judge not only in the moment initial moment of the process, even in the course.