N.J. Stat. § 40:66A-31.10
Any municipality, joint meeting or authority with which a county is authorized to contract under the terms and provisions of this act shall have power, by ordinance duly adopted by its governing body to authorize its proper officials to enter into and execute for it a contract, for such periods of time and under such terms as are deemed proper and necessary, with a county, for the treatment and disposal of all or any specified part of the solid waste arising or collected in or by such municipality, joint meeting or authority, by the solid waste disposal facilities of such county and such contract shall be valid and binding upon the municipality, joint meeting or authority notwithstanding that no appropriation was made or provided to cover the estimated cost of such contract, and the governing body of the municipality, joint meeting or authority shall have full power and authority to do and perform all acts and things on the part of the municipality, joint meeting or authority to be done and performed under the terms and provisions of such contract. Any private solid waste or incinerator company or industry shall likewise have power to enter into a contract with a county for the treatment and disposal of the solid waste or the waste collected or discharged by it by the solid waste disposal facilities of a county.
N.J.S. § 40:66A-31.10