N.J. Stat. § 40:66A-31.12
The chief fiscal officer of each municipality, joint meeting or authority which shall have entered into a contract pursuant to this act, shall cause to be paid to the county, at such times to be agreed upon, the amount of money certified to the municipality, joint meeting or authority by the county pursuant to this act. The power and obligation of such municipality, joint meeting or authority to provide for and make all such payments shall be unlimited and the sums necessary for such payment shall be included in each annual budget of such municipality, joint meeting or authority and such municipality, joint meeting or authority shall be irrevocably and unconditionally obligated to levy ad valorem taxes on all taxable property therein or service charges for users, as the case may be, without limit as to rate or amount to the full extent necessary to make all such payments in full as the same become due. If any part of the amount certified to a municipality, joint meeting or authority by a county, pursuant to this act, shall remain unpaid for 30 days following the date fixed for payment by the contract, the municipality, joint meeting or authority thus in default shall be charged with and liable for, and the chief fiscal officer thereof shall pay to such county interest upon the amount unpaid at the rate of 8% per annum.
N.J.S. § 40:66A-31.12