N.J. Stat. § 30:4-165.3
Whenever any developmentally disabled person is admitted to residential functional services the commissioner or his designated agent shall investigate and take statements concerning residency of the person and the financial ability to pay for the cost of the residential functional services. The department shall determine the financial ability to pay for the cost of care and maintenance and the legal settlement in accordance with applicable provisions of Title 30 of the Revised Statutes and notify the county of settlement, if any, that a person has been admitted.
The county shall maintain a record of any person receiving residential functional services and make the record available for examination by the department. The county shall cooperate fully with the department in the department's review and investigation of the person or his chargeable relative's financial ability to pay for the residential functional services provided to the person. A determination of indigency shall be made by the department and retained in the person's record maintained by the county.
If arrangements are made which are satisfactory to the department for full payment of the cost of care and treatment of the person and if the commissioner or his designated agent is satisfied that the person requires residential functional services and should be admitted then he shall be so admitted.
N.J.S. § 30:4-165.3