The number and letter configurations used on Auto Centennial plates are not used on any other type of plates and therefore may be incorporated into a personalized plate. Owners of an Auto Centennial plate who wish to personalize a different type of plate using the number and letter configuration of their Auto Centennial plate may do so before the plate expires. The original personalized plate service fee is due in addition to the regular renewal fee. Once the Auto Centennial plate expires, the number and letter configuration are no longer reserved to the original owner and anyone seeking a personalized plate may use them.