Md. Code, Alcoholic Beverages and Cannabis § 21–1902

(a) Except as provided in subsection (b) of this section, a license holder may not employ an individual under the age of 21 years to sell or deliver alcoholic beverages.

(b) A license holder may employ an individual at least 18 years old to:

(1) serve and sell alcoholic beverages in a restaurant in connection with the serving or selling of a meal;

(2) serve alcoholic beverages from a service bar to a seated customer; or

(3) operate a lottery ticket terminal in a premises for which a Class A license has been issued.

(c) A license holder may not employ an individual under the age of 18 years to handle alcoholic beverages.