The Canadian territory of Yukon first required its residents to register their motor vehicles and display licence plates in 1914. Only rear plates have been required since 1990.
In 1956, Canada, the United States 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 licence plates for vehicles (except those for motorcycles) at 6 inches (15 cm) in height by 12 inches (30 cm) in width, with standardized mounting holes.[1] The 1954 (dated 1955) issue was the first Yukon licence plate that complied with these standards.