N.J. Stat. § 40A:65-21
The cost of acquiring, constructing, and operating any public improvements, works, facilities, services, or undertakings, or any part thereof, as determined by the management committee, shall be apportioned among the participating local units as provided by the joint contract. Each local unit shall have power to raise and appropriate the funds necessary therefor in the same manner and to the same extent as the local unit would have if it were acquiring and constructing the same for itself, including the power to authorize and issue bonds or other obligations pursuant to the "Local Bond Law,"N.J.S. 40A:2-1 et seq. The management committee shall certify to the participating local units the cost of the acquisition or construction, as well as the apportioned shares thereof, within 15 days after its action thereon.
N.J.S. § 40A:65-21