N.J. Stat. § 26:2K-60
In the event of an emergency, the chief executive officer of any volunteer first aid, ambulance or rescue squad or the mayor or chief executive officer of any municipality may request assistance from the chief executive officer of any volunteer first aid, ambulance or rescue squad located in and serving another municipality for the protection and preservation of life within the territorial jurisdiction served by the squad requesting the assistance.
The chief executive officer of the volunteer first aid, ambulance or rescue squad located in and normally serving a contiguous municipality to whom such a request for assistance is made shall, except as hereinafter otherwise set forth, provide such personnel and equipment as requested to the extent possible without endangering any person or property within the municipality in which the assisting squad is located and which it normally serves.
The members of any squad providing assistance shall have, while so acting, the same rights and immunities as they otherwise enjoy in the performance of their normal duties in the municipality, or other territorial jurisdiction, in which the squad is located and which it normally serves.
If any member of the assisting first aid, ambulance or rescue squad shall, in rendering such assistance, suffer any injury or death, the member or his designee or legal representative shall be entitled to all salary, pension rights, workers compensation and other benefits to which the member would be entitled if the casualty or death had occurred in the performance of the member's duties in the municipality, or other territorial jurisdiction, in which the squad is located and which it normally serves.
N.J.S. § 26:2K-60