New Jersey Statutes Appendix A. Emergency and Temporary Acts § 9-51.2

(a) essential facilities such as roads and water and sewerage systems will not be available and usable during the period of emergency or any part thereof; or

(b) the damage or loss to buildings and structures in the prohibited area exceeds an amount equal to 20% of the total assessed value based at 100% of true value, at the time of the disaster, of the buildings and structures in such area.