International vehicle registration code registration plate. When the distinguishing sign is incorporated in the registration plate, it must also appear on the front registration plate of the vehicle. The requirement to display a separate distinguishing sign is not necessary within the European Economic Area, for vehicles with license plates in the common EU format which satisfy the requirements of the Vienna Convention, and so are also valid in non-EU countries signatory to the convention. Separate signs are also not needed for Canada, Mexico and the United States, where the province, state or district of registration is usually embossed or surface-printed on the vehicle registration
Diplomatic vehicle registration plate diplomatic license plates vary from country to country. They often feature the letters "CD" (for ""Corps Diplomatique""), "D" (for "Diplomat") or prefix of international organisations with diplomatic privileges, such as "EU" (for "EUROPEAN UNION") and "OSCE" (for "Organization For Security And Co-operation In Europe"). Diplomatic vehicle registration plate Most countries issue diplomatic license plates to accredited diplomats. Per the Vienna Convention on Consular Relations, these are special vehicle registration plates which typically have distinctive features to allow diplomatic vehicles to be distinguished from other vehicles by police and other bodies, allowing them to give diplomatic vehicles special treatment and warning