When a complaint is sustained, the findings of fact and the determination shall be submitted to the Chief of Police, who shall make a disciplinary decision based upon this information. The Chief of Police shall provide the Commission with a written explanation of the reason or reasons for his or her disciplinary decision. In any case in which the Commission disagrees with the decision of the Chief of Police, the Commission may investigate the matter further and shall determine the disciplinary action to be carried out by the Chief of Police. Such decision by the Commission shall be deemed final and binding and not subject to reversal by the Chief of Police.