N.J. Stat. § 46:8B-23
Notwithstanding any other provision of this act, if the master deed or by-laws so permit, the entire condominium property, or some or all of the units included therein (together with the undivided interests in common elements and limited common elements appurtenant to such units) may be subject to a single or blanket mortgage constituting a first lien thereon created by recordable instrument by all of the owners of the property or units covered thereby; and any unit included under the lien of such mortgage may be sold or otherwise conveyed or transferred subject thereto. The instrument creating any such mortgage shall provide a method whereby any unit owner may obtain a release of his unit (together with the undivided interest in common elements and limited common elements if any, appurtenant thereto) from the lien of such mortgage and a satisfaction and discharge in recordable form, upon payment to the holder of the mortgage of a sum equal to the proportionate share attributable to his unit of the then outstanding balance of unpaid principal and accrued interest and any other charges then due and unpaid. Such proportionate share attributable to each unit shall be the proportion in which all units then subject to the lien of the mortgage share among themselves in liability for common expenses as provided in the master deed or such other reasonable proportion as shall be specifically provided in the mortgage instrument.
N.J.S. § 46:8B-23