New Jersey Statutes Title 46. Property 46 § 8A-25

Where any building is not insured or where the insurance indemnity is insufficient to cover the cost of reconstruction, the new building costs shall be paid by all the coowners directly affected by the damage, in proportion to the value of their respective apartments, or as may be provided by said bylaws; and if so provided in the bylaws such costs shall be paid by the administrator, or the board of administration, or other form of administration specified in the bylaws.

The provisions of this section may be changed by unanimous resolution of the parties concerned, adopted subsequent to the date on which the fire or other disaster occurred.