New Jersey Statutes Title 40A. Municipalities and Counties 40A § 9-1.8

Any local unit which has adopted a resolution or ordinance, as the case may be, pursuant to section 1 of this act  1 shall give preference in promotion to officers and employees who are bona fide residents of the local unit. When promotions are based upon merit as determined by suitable promotion tests or other objective criteria, a resident shall be given preference over a nonresident in any instance when all other measurable criteria are equal. The preference granted by this section shall in no way diminish, reduce, or affect the preference granted pursuant to any other provision of law.