Any unauthorized person who wears a uniform identical to or substantially similar to a standard uniform used by an office of sheriff in accordance with § 15.2-1610 with the intent to deceive a casual observer or with the intent to impersonate the office of sheriff is guilty of a Class 1 misdemeanor. A second or subsequent offense is punishable as a Class 6 felony. For purposes of this section, “substantially similar” means so similar in appearance as to be likely to deceive the casual observer.