Oregon Revised Statutes Agriculture § 565.875

(1) A person may conduct or participate in rodeos in this state. State law may not be applied in a manner that affords the conducting of or participation in rodeos less favorable treatment than for other organized exhibitions or events. A local ordinance or state agency rule may not prohibit the conducting of or participation in rodeos in this state. This subsection does not prohibit the application of any law, ordinance or rule regulating the time, manner or place for conducting a rodeo in the same manner that the law, ordinance or rule is applied for other events.

(2) A rodeo promoter may establish fees, rules, policies and procedures for events of the rodeo, including but not limited to rules, policies and procedures regarding participant qualifications.