Maryland Code, Public Safety § 13-904

(a) A person who is the owner or who is an agent of the owner of a place of amusement or recreation open to the public may not refuse admission to an officer or enlisted individual of the United States Army, Navy, Marine Corps, Coast Guard, Space Force, or Air Force or the organized militia of this State or of another state because the officer or enlisted individual is in uniform.

(b) A person who violates this section is guilty of a misdemeanor and on conviction is subject to imprisonment not exceeding 6 months or a fine not exceeding $500 or both.