Yes apply even to company of people the principle second the which the clause compromise contained in the statute social which includes the nomination a referee unique ad work of the parts and, in the case of disagreement, of the president of the court, is a Ffetta, Sin from the Data of entry in vigor of of Legislative Decree 17 17 January 2003, n. 5 from nullity surviving detectable ex officio, with the consequence that such a clause not it produces effects and the dispute can be introduced only in front to the judge.