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The U.S. state of Maryland first required its residents to register their vehicles and display license plates in 1910.
Contents
Passenger plates 1910 to present
In 1956, the U.S. states and Canadian provinces came to an agreement with the Automobile Manufacturers Association that fixed the size for license plates for vehicles, except those for motorcycles, at six inches in height by twelve inches 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, as of June 14, 2010, trucks and multi-purpose vehicles are being issued the "War of 1812" 200th anniversary commemorative design plate (see passenger table above) with the same serial format.
Government plates
Plates issued to state and local government agencies, including police and transit buses operated by a city or county or the state (for City of Baltimore).