Open Procedure For The Assignment Of The Work Consultancy Service, Payment Packet Processing And Social Security, Tax And Accounting Obligations Consequent For S.Ec.Aam. Spa. Period 01.01.2026 - 31.12.2026, With The Possibility Of Extension For Periods 01.01.2027 - 31.12.2027 And 01.01.2028 - 31.12.2028