Iowa Code § 172B.2: Transportation certificate exhibited — public offense.

A person transporting livestock shall execute in the presence of a law enforcement officer, at the request of the officer, a transportation certificate. A person who fails to comply with this section commits a public offense punishable as provided in section 172B.6. A person who fails to execute a transportation certificate upon the request of the officer fails to comply with this section even though the person possesses a transportation certificate.