No holder of a manufacturer's license, class A, B, or C, with an on-site sales and consumption permit or an on-premises retailer's license shall be permitted to sell, service, or permit the consumption of alcoholic beverages on either outdoor public or private space without obtaining a sidewalk café endorsement for outdoor public space or a summer garden endorsement for privately owned space. The sidewalk café or summer garden endorsement shall be placed by ABRA on the license.
D.C. Mun. Regs. tit. 23, r. 23-1004