It is all about certification. The localizer and DME are still working perfectly but shut off. The equipment is no longer 'supported by the manufacturer' and therefore is no longer safe to use even if all tests come out fine. The airport ownership is also changing with the old ownership becoming difficult to work with (many different local cities and communities).
After a period of transition the airport should come out stronger than before. We asked for a GNSS approach to both runways, they are planning to put a new localizer in place too; suddenly the A/G radio operators are no longer qualified and need new training; they are no longer allowed to read the local QNH but may only give regional QNH. Belgocontrol has been engaged to provide new training and equipment certification.