A person who is the owner or lessee of, or who otherwise has control over, property that is not a licensed premises shall not knowingly permit any person, knowing or having reasonable cause to believe the person to be under the age of eighteen, to consume or possess on such property any alcoholic beverage. The provisions of this subsection shall not apply to a landlord or manager of the property or to a person under legal age who consumes or possesses any alcoholic beverage in connection with a religious observance, ceremony, or rite.
(Code of Iowa, Sec. 123.47)