I got my judging sheet back from the Atlanta national show with a point deducted for no "wheel cover" on the spare tire. I'm in Street Driven class. I have SS wheels on the car and the stock rim as the spare. I have no cover for the spare and certainly don't have a "wheel cover" on the spare tire. Why did I get docked a point? Was it an error? Are tire covers permitted? Thanks in advance for your response.