N.J. Stat. § 58:14-9
The governing body or board having charge of finances of any municipality, lying in whole or in part within the district may, by resolution, determine that it is advisable and to the interest of the municipality, in order to comply with the provisions of this chapter, to cause the sewage and other polluting matter discharging or which may be discharged into the waters of the Passaic river from its territory within the district to be intercepted by a trunk or main intercepting sewer or sewers and to be conducted to a safe and proper place for discharge and disposal thereat, and may, by said resolution, request the commissioners to prepare and submit maps, plans and specifications for the construction of a joint trunk or main intercepting sewer or sewers and the necessary works for the conduct, discharge and disposal of sewage and other polluting matter as aforesaid, together with an estimate of the probable cost of such construction, and the operation and maintenance thereof, and of obtaining the necessary property rights for said construction, and an estimate of the sewage capacity in said trunk sewer or sewers required by each municipality lying in whole or in part within the district, and also an estimate of the proportion of said cost of construction, as near as may be, which would be apportioned to each of said municipalities, upon the basis expressed in section 58:14-13 of this title.
N.J.S. § 58:14-9