Md. Code, Alcoholic Beverages and Cannabis § 6–305

A license holder or an employee of the license holder may accept as proof of an individual’s age:

(1) if the individual is a resident of the State, the individual’s driver’s license or identification card as provided for in the Maryland Vehicle Law;

(2) a United States military identification card; or

(3) the individual’s electronic credential issued by the Motor Vehicle Administration under Title 16, Subtitle 10 of the Transportation Article.