The license tax imposed by ORS 319.020 shall not be imposed on any aircraft or motor vehicle fuel sold to the Armed Forces of the United States for use in ships, aircraft or for export from this state; but every dealer shall be required to report such sales to the Department of Transportation in such detail as may be required. A certificate by an authorized officer of such Armed Forces shall be accepted by the dealer as sufficient proof that the sale is for the purpose specified in the certificate.
ORS 319.250