Adhesion To The Consip Agreement Concerning The Object "Agreement For The Awarding Of The Supply Of Natural Gas And Related Services For Public Administrations, Pursuant To Article 26, Law 23 December 1999 N. 488 And S.M.I. And Article 58, Law 23 December 2000 N. 388 - Lot 3 Cig 967724398C (Lombardy Excluding The Province Of Milan) Edition 15 Bis Variable Price For 12 Months"