Md. Code, Health - General § 24–207

(a) The Department shall adopt rules and regulations to carry out the provisions of this section, including:

(1) Standards for marking transparent glass doors; and

(2) Definitions of “business establishment”, “public building”, and “commercial building or structure”.

(b) In each business establishment, public building, or commercial building or structure, each door that has a surface area of at least 80 percent transparent glass shall be marked so that it warns any individual nearing it that a glass door is present.

(c) A person who violates any provision of this section or any rule or regulation adopted under this section is guilty of a misdemeanor and on conviction is subject to a fine not exceeding $50.