N.J. Stat. § 5:2A-18.1
No extreme wrestling, boxing, kick boxing or combative sports exhibition, event, performance or contest shall commence or proceed unless two qualified physicians designated by the council shall be at ringside for each extreme wrestling, boxing, kick boxing or combative sports exhibition, event, performance or contest and unless an ambulance containing the standard medical equipment necessary to treat cerebral injuries is stationed at the exhibition, event, performance or contest during the entire time the exhibition, event, performance or contest is taking place. The commissioner or his designee shall delay an exhibition, event, performance or contest until the ambulance and the two qualified ringside physicians required by this section are present.
N.J.S. § 5:2A-18.1