a. When a law enforcement officer or firefighter employed by a law enforcement agency or department that is not subject to the provisions of Title 11A of the New Jersey Statutes is suspended from performing his official duties without pay for a complaint or charges, other than (1) a complaint or charges relating to the subject matter of a pending criminal investigation, inquiry, complaint, or charge whether pre-indictment or post indictment, or (2) when the complaint or charges allege conduct that also would constitute a violation of the criminal laws of this State or any other jurisdiction, and the law enforcement agency or department employing the officer or firefighter seeks to terminate that officer's or firefighter's employment for the conduct that was the basis for the officer's or firefighter's suspension without pay, the officer, as an alternative to the judicial review authorized under N.J.S. 40A:14-150, and the firefighter, as an alternative to the judicial review authorized under N.J.S. 40A:14-22, may submit an appeal of his suspension and termination to the Public Employment Relations Commission for arbitration conducted in accordance with the provisions of section 11 of P.L. 2009, c. 16(C.40A:14-210). A final determination on the officer's or firefighter's suspension and termination shall be rendered by an arbitrator within 180 calendar days from the date the officer or firefighter is suspended without pay. If a final determination is not rendered within those 180 days, as hereinafter calculated, the officer or firefighter shall, commencing on the 181st calendar day, begin again to receive the base salary he was being paid at the time of his suspension and shall continue to do so until the final determination on the officer's or firefighter's termination is rendered.