Md. Code, Alcoholic Beverages and Cannabis § 16–1902

(a) A holder of a Class B license may employ an individual at least 15 years old to perform a task other than one involving selling, serving, or delivering alcoholic beverages.

(b) (1) An individual at least 18 years old may sell, serve, or deliver alcoholic beverages in a restaurant.

(2) A holder of a Class A license may employ an individual at least 18 years old to stock alcoholic beverages and to operate a lottery ticket terminal.

(c) An individual under the age of 21 years may not act as a bartender or in any solely bar–related capacity.