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
Vehicle registration plates of the United Kingdom arrangement. The first group of three numbers identifies the country or international organisation. The second group of three numbers is a serial number sequence starting at 101 for diplomats, 400 for non-diplomatic staff of international organisations, and 700 upwards for consular or other non-diplomatic staff. For example: 101 D 101 identifies the first registration allocated to the Afghanistan embassy and 900 X 400 is a registration allocated to the Commonwealth Secretariat. Honorary consuls are not entitled under UK law to diplomatic vehicle registrations and/or diplomatic driving permits. A limited number of "flag" registrations, bearing a similar format to earlier civilian