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 Macau Vehicle registration plates of Macau In Macau, vehicle registration numbers are issued by the "Direcção dos Serviços para os Assuntos de Tráfego (DSAT)" - the Transport Bureau since 2008. The bureau does not provide the number plates itself, but are made by shops which provide this kind of service to car owners. The Macau vehicle number plates follow the common system adopted for all the Portuguese overseas territories in the 1950s, which, in turn, was based in the system introduced in metropolitan Portugal in 1937. Each vehicle must display two number plates: one at the front and one at the