Maryland Statutes
Part II - Prohibited Acts by License Holder
Section 6-305 - Proof of Age for Sale of Alcoholic Beverages

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.