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 plate series were CL XXXX, EY XXXX, EL XXXx . Afterwards in 1956 a new system with the Sinhala script letter Sri (ශ්‍රී) in the middle was introduced, this started from Reg no "1 Sri 1". The current series of car registrations in Sri Lanka was introduced in 2000 and is on yellow number plates with black characters and a black border. On the left hand side of the number plate is the country emblem, below which is a two-letter region identifier e.g. WP represents the Western Province. The format of the remainder of the registration is LL – DDDD, with