New Jersey Statutes Title 11A. Civil Service 11A § 4-5

Once the examination process has been initiated due to the appointment of a provisional or an appointing authority's request for a list to fill a vacancy, the affected appointing authority shall be required to make appointments from the list if there is a complete certification, unless otherwise permitted by the commission for valid reason such as fiscal constraints.  If the commission permits an appointing authority to leave a position vacant in the face of a complete list, the commission may order the appointing authority to reimburse the commission for the costs of the selection process.