New Jersey Statutes Title 39. Motor Vehicles and Traffic Regulation 39 § 3B-16

a. In any action brought for any injury or damages caused either directly or indirectly by the use of liquefied petroleum gas as the sole fuel, or in addition to or in combination with a conventional fuel, to operate a school bus, or the equipping or converting of a school bus to operate using liquefied petroleum gas as the sole fuel or in addition to or in combination with a conventional fuel, neither the owner or operator of the school bus nor any governmental entity may be found negligent in connection therewith if the school bus was equipped or converted, and operated, as required by section 3 of this act.

b. The immunity provided by subsection a. of this section:  (1) shall be in addition to any other immunity that may apply under the “New Jersey Tort Claims Act,” N.J.S.59:1-1 et seq., or any other law, rule, or regulation;  and (2) shall not apply if it is established that the act or omission causing the injury or damages constitutes gross negligence, recklessness, actual fraud, actual malice, willful misconduct, or criminal conduct.