N.J. Stat. Ann. § 11A:5-7

Inapplication of statutes to promotions. Nothing contained in N.J.S. 11A:5-4 through 11A:5-6 shall apply to promotions, but whenever a veteran ranks highest on a promotional certification, a nonveteran shall not be appointed unless the appointing authority shall show cause before the board why a veteran should not receive such promotion.