N.J. Stat. § 40:10A-6
Whenever the governing body of a county shall establish the position of local historian for the county as herein provided, and one or more municipalities within such county shall establish the position of local historian for such municipality or municipalities, as the case may be, the county local historian may assist the local historian or historians of such municipality or municipalities only upon request. Where any municipality in any county has not so established such position, or where there exists a vacancy in such position in any municipality, the local historian of the county may advise the governing body of any such municipality as herein provided. Otherwise, the local historian of the county shall be responsible only to the governing body of the county, as herein provided.
N.J.S. § 40:10A-6