Maryland Transportation Section 13-629

      Any person to whom special registration plates have been issued under the law relating to common carriers, as set forth in § 13-423(a) of this article, may, after notifying the Administration of his intention to do so:

            (1)      Transfer, for a period of not more than 15 days, the registration plates to a motor vehicle owned by a manufacturer; and

            (2)      Operate the vehicle over the existing route or routes for a trial or demonstration period.