No person being the owner, occupant or otherwise having the care, custody or control of any property located in the city shall knowingly allow any person under the age of 21 years to remain on the property while in the possession of any alcoholic beverage or while consuming any alcoholic beverage.
('88 Code, § 111.02) (Ord. 1987-2, passed 2-18-87) Penalty, see § 111.99