The use of force upon or toward the person of another is justifiable as permitted by law or as would be a defense in a civil action based thereon where the actor has been vested or entrusted with special responsibility for the care, supervision, discipline or safety of another or of others and the force is used for the purpose of and, subject to section 2C:3-9(b), to the extent necessary to further that responsibility, unless:
N.J.S. § 2C:3-8