N.J. Stat. § 40:33-13.18
If the board of chosen freeholders of any participating county shall determine by resolution to withdraw its participation in the support, maintenance and control of the regional library, it shall give notice thereof to the boards of chosen freeholders of other participating counties and to the board of trustees of the regional library. The directors of all boards of chosen freeholders participating in the regional library and the board of trustees shall confer as soon as practicable for the purpose of reaching an agreement among the participating counties as to the time and method of withdrawal by such county, the use of the library facilities thereafter, the adjustment, apportionment, accounting for, settlement, allowance and satisfaction of the rights and liabilities in or with respect to any property, obligations or other matters or things connected with said library and any other matters relating to the regional library. If said boards of chosen freeholders shall be unable to agree as to the terms and conditions of such withdrawal, the matter shall be referred by the board of chosen freeholders of the county which has adopted a resolution to withdraw to the Director of the Division of Local Government for determination on the basis of fairness and equity, the objectives of this act and the regional library agreement, and the public interest. Upon final approval of the resolution or determination by the Director of the Division of Local Government, the participation of the county in the support, maintenance and control in the regional library shall terminate in accordance with the terms of the withdrawal agreement or determination.
N.J.S. § 40:33-13.18