My comments are that it sounds like if you do not want to have the
space you will have to register you call as a "Personalized Plate"
and pay the $21 or so each year.
Marvin - W6MJM (or W6 MJM)
This is a website which informs and calls to action amateur radio operators (hams) against the California Dept. of Motor Vehicles (DMV) unreasonable new policy of adding a space in ham's callsign license plates.