Iowa Code § 204A.6
Except to the extent otherwise provided in the federal hemp law, including 7 C.F.R. §990.25, or by the United States department of agriculture acting under the federal hemp law, a person transporting hemp seed or harvested hemp in this state, on an intrastate or interstate basis, is subject to all of the following public safety requirements:
3. The person must carry a bill of lading under all of the following circumstances:
2024 Acts, ch 1177, §42, 55