1. It is unlawful to permit or allow any person under twenty-one (21) years of age to enter into or remain upon a premises in which a license or permit has been issued pursuant to the Iowa Alcoholic Beverage Control Act wherein more than fifty percent (50%) of the business conducted is the sale, dispensing and consumption of alcoholic beverages.
2. It is unlawful for every person employed with respect to such premises to knowingly permit or fail to take reasonable measures to prevent the entry onto such premises of any and all persons who have not yet attained the lawful age for the purchase, possession, and consumption of alcoholic beverages.
3. However, the provisions of subsections 1 and 2 do not apply when:
A. The underage person is a lawful employee of the license holder, or performing a lawfully contracted service with respect to the premises.
B. The underage person is accompanied by a parent, guardian, or spouse who is twenty-one (21) years of age or older.
4. It is unlawful for any person who has not yet attained the age for lawful purchase, possession, or consumption of alcoholic beverages to enter, attempt to enter, or to remain upon such premises except as provided in subsection 3.