N.J. Stat. § 40:33-6
Upon the adoption of the provisions of this article the board of chosen freeholders may contract with an existing library, or library board, within the county or the library commission of a county library already established and furnishing county library services in another county, for the establishment and maintenance of the county free library in accordance with the provisions of this article and subject to the rules and regulations of the board of chosen freeholders. No independently operated county library shall be established hereafter in any county unless a plan for the financing of the same, indicating the amount annually to be assessed, levied and collected in taxes for the establishment and thereafter for the maintenance, thereof, shall be submitted to, and shall be approved as sufficient by, the head of the Library Development Bureau in the State Library.
N.J.S. § 40:33-6