All owners shall continue to renew the registrations of their vehicles during the month assigned to the first initial of their last name. Each registration fee shall be prorated on a monthly basis. All license plates or validation stickers issued on a staggered basis shall expire on the last day of the month assigned for the renewal of registration by § 32-5-2.2 . If a person operates a motor vehicle without the current license plate displaying the proper validation sticker he is guilty of a Class 2 misdemeanor. Source: SL 1987, ch 215 , § 4; SL 1990, ch 232 ; SL 2007, ch 173 , § 2.