In theme of concessions of services public, the disputes relative to the phase executive of the ratio, is if implicating the construction (and management) work public , is if not connected to the execution of a work, are donated to the jurisdiction of the judge ordinary, and therefore are compromising in referees: in fact at gi UDI O AI referees of judge on fulfilments and non -compliance (e on relative effects) with direct to determination investigation rights and of the obligations of the Administration and of the dealer, as well as of evaluate, in viasta incidental, the legitimacy of the administrative acts accidents on the determination of the sums due.