Certainly no reason for the classic car enthusiasts to NOT be on guard; but according to the article:

"However, the concern and accompanying uproar seems to be largely unfounded speculation."

"The California Air Resources Board (CARB) told Hemmings the classic car usage survey and similar surveys are “simply routine data updates” to ensure their overall vehicle fleet data is accurate, and that it has “nothing to do with vehicle ‘bans’.”