Md. Code, Transportation § 13–946

(a) Special registration plates issued to a transporter under § 13-625 of this title are Class 5 (transporter) registration plates.

(b) For Class 5 (transporter) registration plates, the annual registration fee for each registration plate issued to the applicant shall be established by the Administration.

(c) A Class 5 (transporter) registration plate may be used on vehicles transported by the transporter, but only as permitted by § 13-625 of this title.