(b) a guardian or other person responsible for the care and supervision of an incompetent person, or a person acting at the direction of the guardian or responsible person, may use force upon the incompetent person for the purpose of safeguarding or promoting his welfare, including the prevention of his misconduct or, when he is in a hospital or other institution for care and custody, for the purpose of maintaining reasonable discipline in the institution. The force used for these purposes may be such as is reasonable, whether or not it is "necessary" as required by section 607(1), but must not be designed to cause or known to create a substantial risk of causing death, serious bodily injury, disfigurement or gross degradation;
(c) a person responsible for the maintenance of order in a vehicle, train, vessel, aircraft, or other carrier, or in a place where others are assembled, or a person acting at the responsible person's direction, may use force to maintain order;
(d) a duly licensed physician, or a person acting at his direction, may use force in order to administer a recognized form of treatment to promote the physical or mental health of a patient if the treatment is administered (i) in an emergency, or (ii) with the consent of the patient or, if the patient is a minor or an incompetent person, with the consent of his parent, guardian or other person entrusted with his care and supervision, or (iii) by order of a court of competent jurisdiction;
(e) a person may use force upon another person about to commit suicide or suffer serious bodily injury in order to prevent the death or serious bodily injury of such other person.