Oregon Revised Statutes Oregon Vehicle Code § 825.507

(1) No bond filed pursuant to ORS 825.506 may be canceled or otherwise terminated at any time prior to its expiration until the surety company which executed the same, has filed with the Department of Transportation a notice of cancellation as provided in such bond. Such cancellation shall be effective not less than 30 days from the date of receipt, and no agreement between the parties thereto shall operate to avoid this restriction upon cancellation.

(2) If any bond filed pursuant to ORS 825.506 becomes inoperative, the authority under the certificate or permit involved shall cease and be suspended insofar as it pertains to any affected vehicles until the requirements of ORS 825.506 have been met by the carrier.