Invitation to negotiation without prior publication for the selection of a contractor for the implementation of the service entitled “CONSULTANCY SERVICES FOR THE SUPPORT OF THE REGIONAL F.Ο.D.S.A. OF CENTRAL MACEDONIA DURING THE PROCESS OF AMENDMENT OF THE AEPO OF THE PROJECT “CONSTRUCTION OF A TREATMENT UNIT FOR RESIDUAL MUNICIPAL SOLID WASTE (MSW) AND PREME-SELECTED ORGANIC WASTE (WASTE TREATMENT PLANT) OF THE EASTERN SECTOR OF THE CENTRAL MACEDONIA REGION” in application of articles 32 and 32A of Law 4412/2016 (Government Gazette A’147)