New Jersey Statutes Appendix A. Emergency and Temporary Acts § 9-57.25

The civil defense forces of any other State, which is a party to the Interstate Civil Defense and Disaster Compact ratified on behalf of the State of New Jersey by chapter eight of the laws of one thousand nine hundred and fifty-one,  1 while operating within the limits of this State under the terms and conditions of said compact, shall have the same powers (including that of arrest), duties, rights, privileges and immunities as if they were performing their duties in the State in which they are normally employed or rendering services.