1. A person shall not shoot any rifle on or over any of the public waters or public highways of the state or any railroad right-of-way. 2. A person shall not shoot a shotgun with a slug load, pistol, or revolver on or over a public roadway as defined in section 321.1, subsection 65 . 3. This section does not apply to any peace officers or military personnel in the performance of their official duties. [C31, §1772-c2; C39, § 1794.017; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §109.54 ] 91 Acts, ch 234, §1 C93, §481A.54 Referred to in §805.8B(3)(b) For applicable scheduled fines, see §805.8B , subsection 3, paragraph b