It is declared unlawful for any parent, guardian, or custodian of any minor child to permit or consent to the possession or use by the minor child in his charge or custody of any fireworks or pyrotechnics of an explosive nature. Use by any minor child of any fireworks or pyrotechnics of an explosive nature within the city shall be presumed to be with the permission and consent of such parent, guardian, or other person having the charge or custody of such minor child. (Ord. 174 § 3, 1951)