New Jersey Statutes Title 40A. Municipalities and Counties 40A § 14-156.2

Members of a police force or fire department and force or volunteer fire company in any municipality entering into any agreement hereunder, while on duty rendering assistance to any other municipality or interstate authority created pursuant to an interstate compact entering into said agreement, shall have the same powers, authority and immunities as have the members of the police force or fire department and force or volunteer fire company, as the case may be, of the municipality in which such assistance is being rendered or of the authority for which such assistance is being rendered.