It shall not constitute a defense hereto that such parent, guardian or other adult person having the care, custody or supervision of such juvenile, coming within the provisions of section 22-1 or section 22-2, did not have actual knowledge of the presence of such juvenile in, or about or upon any place in the City away from the dwelling house or usual place of abode of said juvenile, if said parent, guardian or other person having the care, custody or supervision of such juvenile or juveniles, in the exercise of reasonable care and diligence, should have known of the aforementioned unlawful acts of such juvenile or juveniles. (Ord. No. G-865, § 2)