(a) A corporation must hold a special meeting of shareholders:
- (1) On call of its board of directors or the person or persons authorized by the articles of incorporation or bylaws; or
- (2) If the holders of at least ten percent of all the votes entitled to be cast on an issue proposed to be considered at the proposed special meeting sign, date and deliver to the corporation one or more written demands for the meeting describing the purpose or purposes for which it is to be held: Provided, That the articles of incorporation may fix a lower percentage or a higher percentage not exceeding twenty-five percent of all the votes entitled to be cast on any issue proposed to be considered. Unless otherwise provided in the articles of incorporation, a written demand for a special meeting may be revoked by a writing to that effect received by the corporation prior to the receipt by the corporation of demands sufficient in number to require the holding of a special meeting.