Maryland Public Safety Section 12-917

      (a)      A person may not:

            (1)      willfully and persistently operate in the State a boiler or pressure vessel, except a pressure vessel covered by an owner-user inspection service as provided by this subtitle, without a certificate;

            (2)      operate in the State a boiler or pressure vessel at a pressure exceeding that specified on the certificate; or

            (3)      interfere with or impede the official duties of the Commissioner, an authorized representative of the Commissioner, or a member of the Board.

      (b)      A person who violates this section is guilty of a misdemeanor and on conviction is subject for each violation to imprisonment not exceeding 5 years or a fine not exceeding $5,000 or both.