It is unlawful for any person to possess or drink an alcoholic beverage inside or on the grounds of any building operated by a part of the public education system within the city or in those portions of any building, park or stadium within the city which are being used for an activity sponsored by or through any part of the public education system. Any person violating any provision of this section shall be guilty of a class B misdemeanor punishable by a fine of not more than $1,000 or imprisonment for a period not to exceed six months, or by both such fine and imprisonment. (Ord. 97-1, amended, 2000)