Running Single Plate in California

[Charlie Stephens]

While out at the Model A pancake breakfast the other day I noticed a Model A pickup with a single license plate in the rear and nothing in front. The plate had a the official looking year tag normally issued for a YOM plate. Has something changed to allow a single plate or was this guy just pushing his luck? How could he have obtained the YOM tag with only a single plate, I thought you had to show a pair?

Charlie Stephens