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 Pennsylvania is removed or when the full-year registration sticker for the plate comes in, whichever comes first. (Some cars do get issued a paper temporary Pennsylvania plate, usually by those who live out-of-state buying a car in Pennsylvania who need the temporary tag until the vehicle title is transferred to the state they live in.) Until April 2000, new plates had a "T" sticker to denote a temporary tag on the plate until the full-year registration came in the mail with the regular registration sticker. Pennsylvania adopted the current system to combat criminals making counterfeit "T" stickers. For plates that already