Vehicles that are subject to registration must be fitted with number plates before they can be driven on public roads.
The plates must be approved and displayed visibly on the vehicle.
Motorcycles, quadricycles, tricycles, mopeds, light quadricycles and trailers only need one plate, at the rear; all other vehicles must have one plate at the front and one at the rear, both showing the same number.
Under the Luxembourg system, there are two types of registration number:
- numbers of the current series, which are attached to the vehicles themselves and stay with them throughout their lifetime;
- personalised registration numbers, which remain in the name of their holders, unless they give them up so they can be assigned to another person.
It is prohibited to change the registration number of a vehicle already registered in a person's name.
An exception is made when registration plates are stolen.