N.J. Stat. § 59:8-9
A claimant who fails to file notice of his claim within 90 days as provided in section 59:8-8 of this act, may, in the discretion of a judge of the Superior Court, be permitted to file such notice at any time within one year after the accrual of his claim provided that the public entity or the public employee has not been substantially prejudiced thereby. Application to the court for permission to file a late notice of claim shall be made upon motion supported by affidavits based upon personal knowledge of the affiant showing sufficient reasons constituting extraordinary circumstances for his failure to file notice of claim within the period of time prescribed by section 59:8-8 of this act or to file a motion seeking leave to file a late notice of claim within a reasonable time thereafter; provided that in no event may any suit against a public entity or a public employee arising under this act be filed later than two years from the time of the accrual of the claim.
N.J.S. § 59:8-9