New Jersey Statutes Title 40. Municipalities and Counties 40 § 43-23

If a newly created municipality shall include a part of another municipality, any officer thereof residing within the limits of the newly created municipality shall hold his office and perform the duties thereof until the next general election is held for the election of officers within the old municipality, at which time some other person residing in the remaining part of said municipality shall be elected in his place whether the term of office for which he was originally elected has expired or not.