(a) Except in the case of a permanent Class C consumption license issued by this Board, it is unlawful for any person to consume on the licensed premises of any licensee any alcoholic beverages not purchased from the licensee on the said premises. It is also unlawful for any licensee to permit any person to consume any alcoholic beverage not purchased from the licensee on the premises covered by the license and not permitted by the law to be consumed on the premises.
Article 2B, Section 12-107(b)
(b) A Class A, off-sale licensee, his or her agent(s) and/or employee(s) must not permit any person to consume or open any alcoholic beverage on the licensed premises.