New Jersey Statutes Title 40. Municipalities and Counties 40 § 20-35.3

(a) All members of existing boards of chosen freeholders in counties subject to the provisions of this act shall hold office until 12 o'clock noon of the day of the first annual stated meeting of the newly constituted board next after the election of the members thereof at which time the terms of office of such existing members shall expire and they shall be discharged from office.

(b) No elections to existing boards of chosen freeholders in counties subject to the provisions of this act shall be held after the effective date of this act unless such elections are necessary to insure a quorum of members for the board in which case all existing vacancies may be filled in accordance with the provisions of article 3, chapter 20 of Title 40 of the Revised Statutes  1 for the term specified in subsection (a) hereof.