Dateless registrations can be transferred to any age vehicle. They do not have a ‘year identifier’. They were originally issued to vehicles before 1963. Registration numbers that contain and "I" or "Z" originate from Northern Ireland, and are also classed as ‘dateless’. There is no way to tell the age of a vehicle with a dateless number plate by just looking at it, that is why they are used to hide the age of a vehicle, or perhaps just give it a regal distinct look.