N.J. Stat. Ann. § 5:3-2

The municipal authority having control of the extinguishment of fires in any city may detail not more than two members of its fire fighting force at each place of public amusement where machinery and scenery are used, while such place is open to the public. The persons so detailed shall inspect every portion of said place for the purpose of guarding the occupants against fire and panic, and shall have charge of the means provided for extinguishing fires, and control of the employees of such place for that purpose when a fire occurs therein.