Md. Code, Alcoholic Beverages and Cannabis § 6–313

(a) (1) A retail dealer or an agent or employee of a retail dealer may not:

(i) tamper with or change the quantity or quality of the contents of a container of an alcoholic beverage:

1. after the container has been lawfully sealed; and

2. while the contents remain in the container; or

(ii) except as specifically authorized by this article with respect to refillable beer and wine containers, refill a container of an alcoholic beverage with a substance after the container has been emptied of its original contents.

(2) A retail dealer may not possess a container of an alcoholic beverage that has been tampered with or refilled in violation of paragraph (1) of this subsection.

(b) A person who violates this section is guilty of a misdemeanor and on conviction is subject to imprisonment not exceeding 2 years or a fine not exceeding $1,000 or both.