Oregon Revised Statutes Agriculture § 570.150

When, in the judgment of the inspector, all or part of a shipment can be treated to exterminate the plant pests or diseases, the owner or responsible agents of the owner shall be so notified. The notice shall include the exact method and materials to be used, and provide that all treatments shall be given under direct supervision of an authorized inspector and shall be done at the expense of the owner or the party who authorized such treatment or both.