For the next 15 years, new bases started alternately with either L or A leading the prefixes. Hence the 10-letter "roll-over" in series progression as shown below. Since alpha-numeric plates were introduced in 1970, the province developed series based on a 10-character progression for no other reason than the archaic license-office rotary stamps of the day were still keyed to all-numeric plates that were the B.C. Update: Adriaan Bergink reports that upon reaching 999-XXX, British Columbia will change to a new format using the AB1-23C sequence.
British Columbia License Plates British Columbia License Plates