It shall be unlawful for any person to shoot any firearm or gun operated by compressed gases or a spring from any boat across or over any portion of the waters or any lake or reservoir; provided, however, the provisions of this section shall not prohibit the shooting of a shotgun from a boat or across lake or reservoir waters for the purpose of killing waterfowl during the lawful waterfowl hunting season. (§ 19, Ord. 360)