The fiscal year of all credit unions shall end December 31. General and special meetings may be held in the manner and for the purposes indicated in the bylaws. At least ten days before any regular meeting, and at least seven days before any special meeting, written notice shall be given to each member, and in the case of a special meeting, the notice shall clearly state the purpose of the meeting and what matters will be considered thereat. No member shall be eligible to vote at any meeting or to hold any office unless the member owns at least one share of the credit union which is fully paid. At all meetings a member shall have but a single vote, whatever the member's share holdings. Upon resolution of the board of directors, credit union members shall be authorized to vote by mail or other verifiable means for election of directors, credit committee and supervisory members and amendments to bylaws at annual and special meetings. There shall be no voting by proxy. Any firm, society or corporation having a membership in the credit union and entitled to vote may cast its vote by one person upon presentation of written authority of the firm, society or corporation.