2013 ORS § 161.205¹
Use of physical force generally

The use of physical force upon another person that would otherwise constitute an offense is justifiable and not criminal under any of the following circumstances:

(1)(a) A parent, guardian or other person entrusted with the care and supervision of a minor or an incompetent person may use reasonable physical force upon such minor or incompetent person when and to the extent the person reasonably believes it necessary to maintain discipline or to promote the welfare of the minor or incompetent person.

(b) Personnel of a public education program, as that term is defined in ORS 339.285 (Definitions for ORS 339.285 to 339.303), may use reasonable physical force upon a student when and to the extent the application of force is consistent with ORS 339.291 (Use of physical restraint or seclusion).

(2) An authorized official of a jail, prison or correctional facility may use physical force when and to the extent that the official reasonably believes it necessary to maintain order and discipline or as is authorized by law.

(3) A person responsible for the maintenance of order in a common carrier of passengers, or a person acting under the direction of the person, may use physical force when and to the extent that the person reasonably believes it necessary to maintain order, but the person may use deadly physical force only when the person reasonably believes it necessary to prevent death or serious physical injury.

(4) A person acting under a reasonable belief that another person is about to commit suicide or to inflict serious physical self-injury may use physical force upon that person to the extent that the person reasonably believes it necessary to thwart the result.

(5) A person may use physical force upon another person in self-defense or in defending a third person, in defending property, in making an arrest or in preventing an escape, as hereafter prescribed in chapter 743, Oregon Laws 1971. [1971 c.743 §21; 1981 c.246 §1; 2011 c.665 §§10,11; 2013 c.133 §4; 2013 c.267 §4]

Note: See second note under 161.015 (General definitions).