In theme of arbitration c.d. administrative of works public, the regulation transitory of to which 253, co. 34, Legislative Decree 12 April 2006, n. 163 provides, as at discipline of the Arbitration of to which AI Articles 241, 242 and 243 of the itself Code of the Public Contracts, the Salvation of the Clauses Ruomissors and of the Procedures Arbitration ATHEREDENT i at its entry in vigor, in the only cases ibidly specifically foreseen and to condition that i colleges arbitration they are already constituted within this date; n nE the i the i Mmediata applicability of the new ones provisions, having character mandatory, about ai colleges arbitration relative ad contracts not falling in the D.P.R. n. 1063 of 1962.