Md. Code, Health - General § 21–259.1

(a) A person may not open a sealed, closed, or fastened food container in a food store or supermarket if opening the package or container will leave the item in an unsalable condition, unless the person:

(1) Intends to purchase the item; or

(2) Has received from the proprietor authority to open the item.

(b) A person who violates this section is guilty of a misdemeanor and on conviction is subject to a fine not exceeding $25.

(c) The penalty provisions of Subtitle 12 of this title do not apply to this section.