Vehicle registration plates of Maryland
The U.S. state of Maryland first required its residents to register their motor vehicles in 1904. Registrants provided their own license plates for display until 1910, when the state began to issue plates. Plates are currently issued by the Motor Vehicle Administration of the Maryland Department of Transportation. Front and rear plates are required for most classes of vehicles, while only rear plates are required for motorcycles and trailers. Passenger baseplates. 1910 to 1970. In 1956, the United States, Canada, and Mexico came to an agreement with the American Association of Motor Vehicle Administrators, the  Automobile Manufacturers Association and the National Safety Council that standardized the size for license plates for vehicles (except those for motorcycles) at in height by in width, with standardized mounting holes. The 1956 (expired March 31, 1957) issue was the first Maryland license plate that complied with these standards. Non-passenger plates. Multi-purpose vehicles (such as minivans and sport utility vehicles), as well as pickup trucks and cargo vans, have traditionally been issued separate plate types. However, since June 14, 2010, trucks and multi-purpose vehicles have been issued passenger plates with the same serial format, first on the  War of 1812 commemorative base and currently on the "Maryland Proud" base. Government plates. Plates issued to local and state government agencies, including police and transit buses operated by a city or county or the state (for City of Baltimore).