Oregon Revised Statutes Revenue and Taxation § 319.230

Every person operating any conveyance for the purpose of hauling, transporting or delivering motor vehicle fuel in bulk shall, before entering upon the public highways of this state with such conveyance, have and possess during the entire time of hauling or transporting such motor vehicle fuel an invoice, bill of sale or other written statement showing the number of gallons, the true name and address of the seller or consignor, and the true name and address of the buyer or consignee, if any, of the same. The person hauling such motor vehicle fuel shall at the request of any sheriff, deputy sheriff, constable, state police or other officer authorized by law to inquire into or investigate such matters, produce and offer for inspection the invoice, bill of sale or other statement.