N.J. Stat. Ann. § 40:56A-10

The proportion of the expenses of the joint environmental commission to be borne by each participating municipality shall be such as may be determined and agreed upon by the participating municipalities, and said municipalities are hereby authorized to appropriate their respective shares of such expenses. Within the limits thus agreed upon and duly appropriated the commission may employ such clerical and technical or other assistants and may incur such other expenses as it may deem necessary to carry out its functions.