Md. Code, Public Safety § 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.