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 the United States the license plate itself. Pennsylvania issued validation stickers for Philadelphia residents that were displayed in the lower left corner of cars' rear windows for a few years to thwart sticker theft from plates; the practice ended in late 2003 with the last issued stickers bearing January 2005 expirations. As of January 2017, Pennsylvania no longer issues any registration stickers. In Hawaii, counties compete over the cost of vehicle registration dues. Vehicles are purchased at a discount on Oahu compared to the neighboring islands where there is usually only one dealer per vehicle make. Because the outlying counties issue plates starting