Oregon Revised Statutes Labor and Employment; Unlawful Discrimination § 659.870

(1) A political subdivision of the state may not enact or enforce any charter provision, ordinance, resolution or policy granting special rights, privileges or treatment to any citizen or group of citizens on account of sexual orientation, or enact or enforce any charter provision, ordinance, resolution or policy that singles out citizens or groups of citizens on account of sexual orientation.

(2) Any person who believes that a political subdivision has enacted or is enforcing a charter provision, ordinance, resolution or policy in violation of this section may bring an action in circuit court to have the charter provision, ordinance, resolution or policy declared invalid, for injunctive relief and for such other relief as the court may consider appropriate. The court shall award reasonable attorney fees and costs to a plaintiff who prevails in an action under this subsection. The court may award reasonable attorney fees and expert witness fees incurred by a defendant who prevails in the action if the court determines that the plaintiff had no objectively reasonable basis for asserting a claim or no objectively reasonable basis for appealing an adverse decision of a trial court.