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
Aircraft registration country of registration, this suffix is a numeric or alphanumeric code, and consists of one to five characters. A supplement to Annex 7 provides an updated list of approved nationality and common marks used by various countries. While the Chicago convention sets out the country-specific prefixes used in registration marks, and makes provision for the ways they are used in international civil aviation and displayed on aircraft, individual countries also make further provision for their formats and the use of registration marks for intranational flight. When painted on the aircraft's fuselage, the prefix and suffix are usually separated by a