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 plate state, country, athletic team, hobby, art, or custom. Antique auto collectors may use novelty replicas of period registration plates to give their show cars a dated look, or import vehicle owners may use a novelty replica of a foreign plate to give it a foreign image. Some states allow year of manufacture registrations where an original, official plate expiring on the model year of an antique car is revalidated. Wisconsin, for instance, permits the use of year-of-manufacture plates if the state-issued plates are also carried somewhere within the vehicle. California and Ohio also allow the Year-of-manufacture Plates. Today, plates are