No person who is the owner or occupant or who is otherwise in possession and/or control of any property located within the city, through the exercise of reasonable diligence, shall allow any person under 21 years of age to remain on the property while in possession of alcoholic or malt beverages or while consuming alcoholic or malt beverages unless the alcoholic or malt beverages are given by a physician in the regular line of medical practice, by a parent, or by a legal guardian.
(1993 Code, § 75.02) Penalty, see § 130.99