Md. Code Ann., Alco. Bev. & Cannabis § 25-307

(b) (1) Except as provided in paragraphs (2) through (8) of this subsection: (i) the Department has a monopoly on the wholesale distribution of beer, wine, and liquor and retail distribution of off–sale liquor in the county, subject to § 1–309 of this article; and (ii) a person may sell only alcoholic beverages that are purchased from the Department. (2) The holders of the following wholesaler’s licenses may sell or deliver alcoholic beverages for resale to a dispensary: (i) a Class 1 beer, wine, and liquor license; (ii) a Class 2 wine and liquor license; (iii) a Class 3 beer and wine license; (iv) a Class 4 beer license; or (v) a Class 5 wine license. (3) The holder of a Class 6 limited wine wholesaler’s license or nonresident winery permit may sell or deliver wine directly to a dispensary, restaurant, or other retail dealer in the county. (4) The holder of a Class 7 limited beer wholesaler’s license or nonresident brewery permit may sell or deliver its own beer to a dispensary, restaurant, or other retail dealer in the county. (5) The holder of a Class 8 liquor wholesaler’s license or nonresident distillery permit may sell or deliver its own liquor to a dispensary, restaurant, or other retail dealer authorized to sell liquor in the county. (6) A holder of a direct wine shipper’s permit may ship wine directly to a consumer in the county. (7) A dispensary, restaurant, or other retail dealer in the county may purchase wine directly from a holder of a Class 6 limited wine wholesaler’s license or of a nonresident winery permit. (8) A dispensary, restaurant, or other retail dealer in the county may purchase beer directly from a holder of a Class 7 limited beer wholesaler’s license or of a nonresident brewery permit. (9) A dispensary, restaurant, or other retail dealer authorized to sell liquor in the county may purchase liquor directly from a holder of a Class 8 liquor wholesaler’s license or of a nonresident distillery permit. (10) A holder of a charity wine auction permit in the county may receive and sell wine obtained from any source listed under § 2–137 of this article.