N.J. Stat. § 40A:10-38.3
A copy of the proof of approval of the bylaws and plan of risk management issued by the Commissioner of Insurance pursuant to section 6 of P.L. 1983, c.372 (C.40A:10-41) shall be filed in the Office of the Secretary of State, the Director of the Division of Local Government Services, and the Commissioner of Insurance. Upon proof of such filing, the joint insurance fund therein referred to shall, in any suit, action or proceeding involving the validity or enforcement of, or relating to, any contract or obligation or act of the joint insurance fund, be conclusively deemed to have been lawfully and properly created, organized and established and authorized to transact business and exercise its powers under this act. Copies of the filing, duly certified by the Secretary of State, shall be admissible in evidence in any suit, action or proceeding and shall be conclusive evidence of due and proper filing thereof.
N.J.S. § 40A:10-38.3