N.J. Stat. Ann. § 40:14B-66

Each municipal authority shall cause an annual audit of its accounts to be made, and for this purpose it shall employ a registered municipal accountant of New Jersey or a certified public accountant of New Jersey. The audit shall be completed and filed with the municipal authority within 4 months after the close of the fiscal year of the municipal authority and a certified duplicate copy thereof shall be filed with the Director of the Division of Local Government in the Department of the Treasury within 5 days after the original report is filed with the municipal authority.