N.J. Stat. Ann. § 52:27BB-27

The board shall, after careful study and investigation of accounting requirements, prescribe uniform accounting systems for municipalities and counties, and may, from time to time, revise or amend such systems. The board may classify municipalities and counties in accordance with different types of accounting requirements and may prescribe a suitable variation of the uniform system to apply to each class. The use of the system when prescribed, shall be mandatory in accordance with the regulations of the board. This section shall not be construed to prevent the director, with the consent of the board, from approving the continued use of a system used by county or municipality that meets the requirements of and is in substantial conformity with the uniform system prescribed.