The members of the Commission shall elect annually by a simple majority of the total members present at a regular meeting, a member to serve as chairman and a member to serve as vice-chairman. The chairman shall preside at all meetings of the Commission and shall have the power to call meetings of the Commission with proper notice. The vice-chairman shall perform these functions in the absence or incapacity of the chairman. A quorum shall consist of a simple majority of the total membership of the Commission. A quorum shall be necessary to conduct any official business.