Indiana Code Title 28. Financial Institutions § 28-13-5-3

(1) On call of the corporation's board of directors or the person or persons, including shareholders or officers, specifically authorized to do so by the articles of incorporation or bylaws.

(2) If the holders of at least twenty-five percent (25%) of all the votes entitled to be cast on any issue proposed to be considered at the proposed special meeting sign, date, and deliver to the corporation's secretary one (1) or more written demands for the meeting describing the purpose or purposes for which the meeting is to be held.