Justification; use of physical force generally.
The use of physical force upon another person which 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 person under the age of twenty-one or an incompetent person, and a teacher or other person entrusted with the care and supervision of a person under the age of twenty-one for a special purpose, may use physical force, but not deadly physical force, upon such person when and to the extent that he reasonably believes it necessary to maintain discipline or to promote the welfare of such person.
2. A warden or other authorized official of a jail, prison or correctional institution may, in order to maintain order and discipline, use such physical force as is authorized by the correction law.
3. A person responsible for the maintenance of order in a common carrier of passengers, or a person acting under his direction, may use physical force when and to the extent that he reasonably believes it necessary to maintain order, but he may use deadly physical force only when he 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 injury upon himself may use physical force upon such person to the extent that he reasonably believes it necessary to thwart such result.
5. A duly licensed physician, or a person acting under his direction, may use physical force for the purpose of administering a recognized form of treatment which he reasonably believes to be adapted to promoting the physical or mental health of the patient if
(a) the treatment is administered with the consent of the patient or, if the patient is under the age of eighteen years or an incompetent person, with the consent of his parent, guardian or other person entrusted with his care and supervision, or
(b) the treatment is administered in an emergency when the physician reasonably believes that no one competent to consent can be consulted and that a reasonable person, wishing to safeguard the welfare of the patient, would consent.
6. A person may, pursuant to the ensuing provisions of this article, use physical force upon another person in defense of himself or a third person, or in defense of premises, or in order to prevent larceny of or criminal mischief to property, or in order to effect an arrest or prevent an escape from custody. Whenever a person is authorized by any such provision to use deadly physical force in any given circumstance, nothing contained in any other such provision may be deemed to negate or qualify such authorization.