OPEN PROCEDURE PURSUANT TO ART. 71 OF LEGISLATIVE DECREE 36/2023 FOR THE CONCLUSION OF A FRAMEWORK AGREEMENT PURSUANT TO ART. 59 OF LEGISLATIVE DECREE 36/2023 WITH A SINGLE ECONOMIC OPERATOR, FOR THE MAINTENANCE OF THE BUILDINGS OF ASP OF PALERMO LOCATED IN AREA 4 AND THE MINOR ISLANDS OF USTICA, LINOSA AND LAMPEDUSA, TO BE CARRIED OUT ON THE PLATFORM OF THE ELECTRONIC MARKET OF THE PUBLIC ADMINISTRATION (ME.PA) MANAGED BY CONSIP-MEF