507.04 PARENTAL RESPONSIBILITY.
   (a)   No person having legal custody of a minor shall knowingly permit, or, by inefficient control, allow such minor to be in or upon any public place in violation of a curfew limitation established hereby, and under circumstances not constituting an exception hereto. “Knowingly” includes knowledge which a parent reasonably should be expected to have concerning the whereabouts of a minor in his or her custody.
   (b)   It shall be an affirmative defense to a violation under this section that the parent involved within thirty days preceding the alleged offense filed or caused to be filed a complaint against the minor alleging him or her to be an unruly child under Ohio R.C. Chapter 2151, which complaint has been adjudicated or is then pending.
(1980 Code 142.04)