Iowa Code § 483A.19: Showing license document to officer.

Every person shall, while fishing, hunting, or fur harvesting, show the person’s license document to any peace officer or the owner or person in lawful control of the land or water upon which licensee may be hunting, fishing, or fur harvesting when requested by the persons to do so. Any failure to so carry or refusal to show or so exhibit the person’s license document shall be a violation of this chapter. However, except for possession and exhibition of deer licenses and tags or wild turkey licenses and tags, a person charged with violating this section shall not be convicted if the person produces in court, within a reasonable time, a license document for hunting, fishing, or fur harvesting issued to that person and valid when the person was charged with a violation of this section.