User talk:2603:6000:8D40:77F:C087:9A06:8F4D:9DB6

1911 to 1949
No slogans were used on passenger plates during the period covered by this subsection.

1950 to present
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 6 in in height by 12 in in width, with standardized mounting holes. The 1955 (dated 1956) issue was the first Oregon license plate that complied with these standards.

All plates from 1955 until present are still valid, provided they are displayed on the vehicle to which they were originally issued and the vehicle has been continuously registered.

1911 to 1961
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 in in height by 12 in in width, with standardized mounting holes. The first New Brunswick licence plate that complied with these standards was issued seven years beforehand, in 1949 (dated 1950).