(a) The Chairman is the principal executive officer of the Commission and, subject to the general policies of the Commission and to such regulatory decisions, findings, and determinations as the Commission is by law authorized to make, he or she exercises all of the executive and administrative functions of the Commission.

(b) The Commission shall annually elect a Vice Chairman for a term beginning on June 1. The Vice Chairman shall serve until the election of his or her successor. The Vice Chairman acts in the absence or disability of the Chairman or in case of a vacancy in the Office of the Chairman.