N.J. Stat. § 30:1-14
In addition to the jurisdiction and power conferred upon the commissioner over the institutions and noninstitutional agencies named in section 30:1-7 of this Title, he shall have supervision over all institutions and organizations, whether county, municipal, public or private, to which payments are made from the treasury of the State, directly or indirectly, for or on account of the board and maintenance of any persons admitted or committed thereto, with the right of visitation and inspection at any and all times, for the purpose of determining the conditions, circumstances and surroundings under which such persons so admitted or committed are lodged, boarded, cared for and maintained. In the execution of this power any member of the State board, the commissioner, or his duly authorized agent, shall have the right of admission to all parts of any building or buildings in which such persons are lodged, cared for or treated, as often as may be necessary. The books, records and accounts of such institution or organization shall be open to his inspection, or for inspection and audit by the State Auditor, or any of his subordinates, in so far as they relate to the receipt and expenditure of State moneys, in order to determine whether the amount so paid by the State is a proper charge, which question the commissioner shall determine, and also to determine whether such persons so admitted or committed are properly and adequately boarded, lodged, treated, cared for and maintained. The extent and results of such supervision and inspection shall be included in the annual or any special report of the commissioner with such recommendations as he may deem necessary.
N.J.S. § 30:1-14