In the absence or disability of the president, the vice president(s), in order of their rank as fixed by the board of directors (or if not ranked, the vice president designated by the board) shall perform all the duties of the president and, when so acting, shall have all the powers of, and be subject to all the restrictions upon, the president. Each vice president shall have such other powers and perform such other duties as may from time to time be prescribed by the board of directors or these bylaws.