Joint Framework Agreement Between The City Of Liège And The Public Center For Social Action (C.P.A.S.) In 8 Lots To Be Concluded With A Single Participant, For A Fixed Period Of 24 Months Renewable For 24 Months For The Renewal, Repair And Maintenance Work On Roofs To Be Carried Out In The Municipal Buildings Of The City, The Police, The Land Administration And The C.P.A.S. From Liège