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 China Vehicle registration plates of China Vehicle registration plates in China () are mandatory metal or plastic plates attached to motor vehicles in mainland China for official identification purposes. The plates are issued by the local Vehicle Management Offices, under the administration of the Ministry of Public Security. Hong Kong and Macau, both of which are Special administrative regions of China, issue their own licence plates, a legacy of when they were under British and Portuguese administration. Vehicles from Hong Kong and Macau are required to apply for licence plates, usually from Guangdong province, to travel on roads in Mainland China.