(1) A proxy may be executed in writing by a member or stockholder or by the member's or stockholder's authorized representative.(2) A proxy is not valid in any of the following circumstances: (a) Eleven months after the date of its execution, unless otherwise provided in the proxy.(b) Unless executed in an instrument separate from other forms or documents relating to the member's deposit accounts.(c) For any meeting at which the member or stockholder who gave a proxy is present, provided that before the taking of any vote, notice of the member's or stockholder's attendance and intention to vote at the meeting is given by that person to an official whom the savings bank shall identify at the meeting as having responsibility for maintaining a record of attendance.1991 a. 221; 1995 a. 103.