Maryland Alcoholic Beverages Section 2-204
§ 2-204.
  A Class 3 manufacturer's license:
    (1)   Is a winery license; and
    (2)   Authorizes the holder to:
      (i)   Establish and operate in this State a plant for fermenting and bottling wine at the location described in the license;
      (ii)   Import bulk wine from the holder of a nonresident dealer's permit;
      (iii)   Sell and deliver wine to any wholesale licensee or permit holder in this State, or person outside of this State authorized to acquire wine;
      (iv)   Sell wine made from products grown in Maryland at a retail price at the plant to persons participating in a guided tour of the facility. The purchase shall be limited to not more than one quart per person per year provided the purchaser has attained the Maryland legal drinking age; and
      (v)   Serve at no charge not more than 6 ounces of wines made at the licensed facility to a person who is participating in a guided tour of the facility, provided the person has attained the Maryland legal drinking age.