Maryland Public Safety Section 12-306
§ 12-306.
  (a)   An industrialized building that is manufactured after June 30, 1977, may not be sold, offered for sale, or installed in the State unless the industrialized building:
    (1)   is certified by the Department for sale in the State; and
    (2)   bears the insignia provided by the Department.
  (b)   A manufactured home that is manufactured after January 1, 1973, may not be sold or offered for sale to a first user in the State unless the manufactured home:
    (1)   is certified by the Department for sale in the State and bears the insignia provided by the Department; or
    (2)   is certified and labeled under the Manufactured Home Construction and Safety Standards Act.