Md. Code, Alcoholic Beverages and Cannabis § 21–1104

(a) The Board may issue a refillable container permit for draft beer to a holder of a draft beer permit who also holds any other license except a Class A license or a Class C license.

(b) A person who violates this section is guilty of a misdemeanor and on conviction is subject to imprisonment not exceeding 1 year or a fine not exceeding $5,000 or both.