It shall be unlawful for any operator of an establishment knowingly to permit a juvenile to remain at the establishment under circumstances not constituting an exception to, or otherwise beyond the scope of, section 15-10. The term “knowingly” includes knowledge that an operator should reasonably be expected to have concerning the patrons of the establishment. The standard for “knowingly” shall be applied through an objective test: whether a reasonable person in the operator’s position should have known that the patron was a juvenile in violation of section 15-10. (Ord. No. G-78-15, § 1, 6-15-78; Ord. No. G-95-21, § 1, 6-15-95)