Oregon Revised Statutes Oregon Vehicle Code § 825.304

(1) In any prosecution for any violation of ORS 825.100 or 825.104 of any driver who is employed by the owner or lessee of the vehicle involved in the violation to operate the vehicle, the court shall make the owner or lessee of the vehicle a codefendant if appearance has not been made by the driver within 15 days of the date the driver was cited to appear in court.

(2) If it is found that the owner or lessee caused or permitted the driver to operate the vehicle in violation of ORS 825.100 or 825.104, and if the owner or lessee is found guilty of violating any of those provisions, the court may dismiss the charges against the driver.