N.J. Stat. § 40A:13-17
When a new county or municipality is formed altering the lines of an existing county or municipality, an accurate survey shall be made of the county or municipality. The boundaries of the new county or municipality shall be ascertained and determined as nearly as may be in accordance with the provisions of N.J.S. 40A:13-3 through 40A:13-16 inclusive.
In the case of a new county, a copy of the commissioners' report shall be recorded and filed in the office of the Secretary of State and one in the office of clerk of the newly formed county within 6 months after formation.
In the case of a new municipality, a copy of the commissioners' report shall be recorded and filed in the office of the county clerk and one in the office of the clerk of the newly formed municipality within 6 months after formation.
N.J.S. § 40A:13-17