Is there another source that clarifies the claim that CA law explicitly includes corporations in the car pool lane laws? As it is, this is such an obvious publicity stunt that I am not inclined to trust the lawyers for Frieman. Some lady in Seattle goes around "marrying" corporations. Unsurprisingly, they aren't legal marriages.
I haven't looked at the relevant laws, but even if this guy wins his case they will just patch the law to explain that the rules in carpool lanes require natural persons.