N.J. Stat. § 30:4-177.16
Application for the admission of any individual to the institute, other than by transfer or voluntary request, shall be upon forms prescribed by the Commissioner of Institutions and Agencies and upon certification of two physicians that the person suffers from a disease or disfunction of the brain or nervous system, requires hospital care, and that unless such care is provided the health and welfare of the individual or that of others in society will be jeopardized.
Upon the making of such an application for the admission of an individual to the institute, the further procedure with respect thereto shall be exactly the same as that provided by law for the commitment of any person to a mental hospital except that instead of an order of commitment the judicial officer shall enter an order authorizing admission of the person, which shall contain a determination of legal settlement, indigency and rate of payment of maintenance and the individual or governmental agency chargeable with the payment thereof.
N.J.S. § 30:4-177.16