Maryland Natural Resources Section 8-737
§ 8-737.
  (a)   A person may obtain a historical watercraft identification plaque from the Department for a boat that is:
    (1)   25 years old or older; and
    (2)   Powered by the boat's original type of power plant.
  (b)   The fee for a historical watercraft identification plaque is $25. The identification plaque shall be valid for the life of the boat.
  (c)   The Department shall issue a historical watercraft identification plaque, of the Department's own design, to a person who applies to the Department on a form the Department supplies. When prominently displayed on the boat, a historical watercraft identification plaque shall entitle the boat owner to apply to participate in parades, shows, and special displays. The historical watercraft identification plaque may not qualify a boat for general recreational use.