Hello there SS. That is correct. UK. There are different registrations regulations for "O" plates in the different provinces, but that is not the problem in Belgium. Mine is '89, has an (O)ldtimer plate, and was registered before 2017 so qualifies fully for reduced circulation tax. Its the Low Emission Zone Regulations and the Mobiliteit (mobility) programs that are the problem - at least for me, and possibly a lot of others are getting a bit fed up with it as well. The goal of mobiliteit is to progressively minimise private vehicle traffic of every type, and LEZ the pollution. To achieve this, roads are being narrowed, pavements widened, street parking spaces reduced without building any new garage space, and LEZs are being expanded. People have been forced to junk their cars. This might all be fine if the public transport system hadn't been "re-organized", you are not a resident, paying city taxes and could apply for exemptions, but you can't. So every time my car or a friend's is caught on camera, its a whacking fine. This applies to all cars registered in Belgium or not, the only problem being that the cameras can not pick up some foreign plate registrations. Where they can, they will send you a bill, but it might just take a bit longer. I would be careful about reading the LEZ signs if I were you. Somewhat annoyingly, the battle on emissions does not extend to scooters, the ring roads, the sea ports, the airports, or down people's oil-fired central heating vents.