161.205 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 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. A teacher may use reasonable physical force upon a student when and to the extent the teacher reasonably believes it necessary to maintain order in the school or classroom or at a school activity or event, whether or not it is held on school property.
(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