Open Procedure Pursuant To Art. 71 Of Legislative Decree 36/2023, Carried Out In Electronic Mode Pursuant To Art. 25 Legislative Decree 36/2023, For The Assignment, By Framework Agreement With A Single Operator Pursuant To Art. 59 Paragraph 3 Of Legislative Decree 36/2023, Of Construction Works And Tubations Of Aqueduct And Sewer, Divided Into 4 Lots.