N.J. Stat. § 54:3-16
Each county tax administrator, under the supervision and control of the county board of taxation, shall be responsible for the administrative functions of the board, and, pursuant to such supervision and control, shall direct all officers charged with the duty of making assessments for taxes in every taxing district in the county. Such officers shall be subject to, and shall, in making assessments, be governed by directions issued by the county tax administrator pursuant to such rules and orders as shall be issued by the county board, in the enforcement of the objects of this title. Before making any such rules or orders, the county board shall submit them to the Director of the Division of Taxation, and no rule or order shall be considered adopted by the county board until approved by him. Each county board shall, within 90 days of the effective date of this amendatory and supplementary act, promulgate rules governing the conduct and performance of such officers. If such rules are not promulgated within the time set forth herein, the conduct and performance of such officers shall be governed by such rules as the Director of the Division of Taxation shall promulgate, which rules shall be enforced by the county board.
N.J.S. § 54:3-16