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The U.S. state of Missouri first required its residents to register their motor vehicles and display license plates in 1911.
Contents
Passenger plates 1911 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 1955 (dated 1956) issue was the first Missouri license plate that complied with these standards.
Month coding
The current base, first issued in June 2008, features serials coded by the month of the registration's expiration. The first letter of the serial constitutes this code. Once all available combinations beginning with the first letter assigned to that month are issued, a second code letter may be used for that month.
Optional types
Optional types on this base continue to be issued, likely until January 2009. Most, if not all, optional types on this base were available in personalized format and with certain non-passenger designations. Where applicable, this designation was printed in a small rectangle screened in the upper right corner of the plate.