Vehicle registration plates of the Republic of Ireland Vehicle registration plates of the Republic of Ireland In the Republic of Ireland, vehicle registration plates (commonly known as "number plates") are the visual indications of motor vehicle registration – officially termed "index marks" – which it has been mandatory since 1903 to display on most motor vehicles used on public roads in Ireland. The alphanumeric marks (or "registration numbers") themselves were issued by the local authority in which a vehicle is first registered. The current specification for number plates is the format YYY–CC–SSSSSS. Those issued from 1987 to 2012 had the format YY–CC–SSSSSS. The components are: Since 1991, the
Vehicle registration plates of California Vehicle registration plates of California The U.S. state of California first required its residents to register their motor vehicles in 1905. Registrants provided their own license plates for display until 1914, when the state began to issue plates. Plates are currently issued by the California Department of Motor Vehicles. Front and rear plates are required on most types of vehicle in California, including all passenger vehicles. On motorcycles and some other non-passenger types, only rear plates are required. On all vehicle types, registration validation stickers are also required, to be displayed on the rear plate. In 1956, the United States,