The Canadian province of Alberta first required its residents to register their motor vehicles in 1906. Registrants provided their own licence plates for display until 1912, when the province began to issue plates. Only rear plates have been required since 1992.
List of plate issues
1912 to 1915
When the first plates were issued in Alberta, a number of materials were tried. 1912 and 1913 used porcelain enameled iron, and 1914 and 1915 used thin sheet metal with silkscreened number rolled over a wire frame. Serials issued started at 1 every year, and every year the registrant could request the same number as the previous year. The 1912 plate followed the design of other provinces, but 1913 to 1915 featured the Alberta shield and year on the left side. Registration expired December 31.
1916 to 1920
Starting with the 1916 issue, a heavier gauge of metal was used, and the text moved to the right side, saying ALTA, and the year. The 1918 plates were the first embossed plates, and 1920 had the first painted border.
1921 to 1924
The 1921 to 1924 issues each used several plate sizes, depending on the length of the serial. Hyphens were also used in serials for the first time.
1925 to 1936
The 1925 base was the first to feature the full province name. Six-digit serials were used for the first time in 1929.
1937 to 1951
In 1937, the licence year was changed to April 1 to March 31, and continued as such until 1984. The 1940 (expiring March 31, 1941) base was the first to feature a slogan, namely "Drive Safely". This slogan was used again on the 1941 (expiring March 31, 1942) base, before the 1942 (expiring March 31, 1943) base featured "Canada", the first and thus far only Alberta base to feature the country name. Due to metal conservation for World War II, the 1943 (expiring March 31, 1944) base was revalidated until March 31, 1945, with windshield stickers. Six-digit serials were issued on each base from 1947 through 1951.
1952 to 1953
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 in height by in width, with standardized mounting holes. The first Alberta licence plate that complied with these standards was issued four years beforehand, in 1952.
The 1952 base was also the first reflective base, with beaded white characters on a black background. Letters were used in passenger serials for the first time: five-character serials were used, with a single letter in the third and later the second position. The letter Q was not used, while the letters I and O were at a smaller size to prevent confusion with the numbers 1 and 0.
Passenger and dealer plates on this base were revalidated for 1953 with black-on-aluminum "53" tabs. Other vehicle types, however, received new plates for 1953, with dark blue characters on a white background.
1954 to 1972
Two-letter series were introduced in 1954, with each series initially followed by three digits. In 1960, the number of digits increased to four, with each series running from 0001 to 9000. From 1964 through 1972, only B, C, E, H, J, K, L, N, R, T, X and Z were used as the first letter, with four such letters allocated each year. The 1967 base commemorated the centennial of Canadian Confederation.
1973 to 1983
The 1973–74 base used the AB-12-34 serial format, with B, C, E, H, K and L used as the first letter. It was also the first base to feature the "Wild Rose Country" slogan, which remains in use today.
The 1975–84 base introduced the ABC-123 serial format, which provided many more combinations. However, only 15 letters were used at first (B, C, D, F, G, H, J, K, L, N, P, R, T, V and X), while others were later used only as the first letter (with some exceptions), and the overall order of issuance was not strictly alphabetical. Most plates on this base were manufactured in Alberta, but some were manufactured in Quebec and Nova Scotia using these provinces' serial dies.