§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 title, 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.