W. Va. Code § 24A-6-4
The commission shall prescribe a uniform vehicle identification card which shall be displayed within the cab of each power unit operated by any motor carrier, showing thereon the description and serial number of the vehicle for which it is issued and the number given to the vehicle by the commission, and may contain such other information as may be required by the commission. Such cards shall be issued annually and displayed in each such power unit not later than July first of each year. It shall be unlawful for any motor carrier to operate any power unit within this state unless said identification card is displayed within such vehicle. It shall be unlawful for the motor carrier, his agent, servant, or employee, or any other person to use or display said identification card or other insignia of authority from the commission at any time after the certificate or permit issued to said motor carrier has expired or has been cancelled, suspended, revoked, or otherwise disposed of.
W. Va. Code § 24A-6-4