N.J. Stat. § 30:1-13
The commissioner and the State board shall arrange for personal contact with each of the institutions and the work of the noninstitutional agencies, by visitations and by such other means as they may determine to be necessary and proper, so that they may be as nearly as is practicable continually in touch with and informed concerning the general condition and progress of the several institutions and noninstitutional agencies and the general results of the management thereof and the condition and welfare of the inmates and other persons committed or admitted. The commissioner and the State board shall, personally or by their designated representative, visit and inspect each institution at least semiannually, at periods which shall not be fixed in advance.
N.J.S. § 30:1-13