N.J. Stat. § 46:8A-18
The coowners of the apartments are bound to contribute pro rata toward (a) the expenses of administration, of furnishing services and of maintenance and repair of the exterior of each building and of the general common elements, and, in the proper case, of the limited common elements, of the property; (b) the expenses relating to the maintenance and servicing of recreational areas and related facilities and expenses involved in furnishing services to coowners and in furnishing for coowners areas and facilities for pursuing activities;and (c) any other expense lawfully agreed upon.
The amount of each contribution shall be computed by the administrator, or the board of administration, or other form of administration specified in the bylaws, and with respect to the expenses referred to under (a) above may be based upon the assessed valuation of the apartment, or such other basis of computation as in the opinion of the administrator, or the board of administration, or other form of administration specified in the bylaws, is more equitable, and with respect to the expenses referred to in (b) above shall be based upon a per capita assessment against each occupant, and with respect to the expenses referred to under (c) above, upon the basis agreed upon.
No coowner may exempt himself from contributing toward such expenses by waiver of the use or enjoyment of the common elements or by abandonment of the apartment belonging to him.
N.J.S. § 46:8A-18