(1) A company must ensure all motor vehicles operated, including leased, substitute or emergency vehicles, display the certificate holder's name (or registered trade name) and certificate number on each side of the vehicle. All identifications must be clearly legible. All identifications, except those displayed on leased or substitute vehicles, must be permanent.

(2) Exception: Companies may use temporary markings on vehicles when operated under a lease agreement with a term of 30 days or less.