1942 plates were to be revalidated with a 1943 windshield sticker, but the program was killed. These tabs featured a 2-letter prefix which continued on plates through 1955. The prefix is serial, not a county or type code. A delivery problem caused a plate shortage, so 1946 plates were revalidated with a 1947 windshield sticker that expired on July 15. Eventually the new plates were issued, in pairs again.
Exempt plates become permanent and no longer have an embossed year.
No tabs were ever issued, but the slots were not discontinued until 1960. Higher numbered plates are of a smaller size, which continued to 1955. The bill is rejected. Alternate color replacement plates exist into the 70's. New plate colors are experimented with.