Maryland Code, Transportation § 13-607

(a) A person may not issue any temporary registration plate that contains any misstatement of fact.

(b) A person may not knowingly insert any false information on the face of a temporary registration plate.

(c) A dealer may not issue a temporary registration plate to any person who has annual registration plates for a vehicle that has been sold or exchanged.

(d) A dealer may not lend a temporary registration plate to any person.

(e) A dealer may not use a temporary registration plate on any vehicle that the dealer owns.

(f) A dealer may not otherwise issue, assign, transfer, or deliver any temporary registration plate to any person for any reason except as authorized by this part.