Md. Code, Alcoholic Beverages and Cannabis § 4–205

(a) This section does not apply to:

(1) an establishment that already holds a Class A, Class B, or Class D beer license, beer and wine license, or beer, wine, and liquor license; or

(2) a license holder that sells alcoholic beverages at discount prices.

(b) A local licensing board may not issue a Class A, Class B, or Class D beer license, beer and wine license, or beer, wine, and liquor license for use in conjunction with or on the premises of:

(1) a chain store;

(2) a supermarket; or

(3) a discount house.