(a) Unless the articles of incorporation or bylaws provide otherwise, a shareholder may vote his or her shares in person or by proxy.
(b) A shareholder or his or her agent or attorney-in-fact may appoint a proxy to vote or otherwise act for the shareholder by signing an appointment form or by an electronic transmission of the appointment. An electronic transmission must contain or be accompanied by information from which one can determine that the shareholder, the shareholder's agent or the shareholder's attorney-in-fact authorized the electronic transmission.
(c) An appointment of a proxy is effective when a signed appointment form or an electronic transmission of the appointment is received by the inspector of election or the officer or agent of the corporation authorized to tabulate votes. An appointment is valid for eleven months unless a longer period is expressly provided in the appointment form.
(d) An appointment of a proxy is revocable unless the appointment form or electronic transmission states that it is irrevocable and the appointment is coupled with an interest. Appointments coupled with an interest include the appointment of:
(1) A pledgee;