Each meeting of the members shall be presided .over by the Chairman of the board of directors (if any).or, in his absence, by such person. as may be designated from time to time by the board of directors or, in the absence of such person or if there shall be ~o such designation, by a chairman to be chosen at the meeting. The Secretary shall act as secretary of each meeting of the members or, if he shall not be present, such person as may be designated by the board of directors shall act as such secretary or, in the absence of such person or if there shall be no such designation, a secretary shall be chosen at.the meeting.