Iowa Code § 166A.10

Sheep from noncertified scabies-free areas within this state shall not enter certified scabies-free areas unless they have been treated in an approved manner under supervision within ten days preceding movement and satisfactory evidence of treatment accompanies the shipment. However, such sheep may be moved into certified scabies-free areas if consigned directly to a stockyard market, auction market, or slaughter establishment, under federal inspection, provided the sheep are accompanied by a certificate of veterinary inspection stating number, description, consignor, and consignee.