Indiana Code Title 36. Local Government § 36-2-2-8

Sec. 8. (a) If the public interest requires a special meeting of the executive, such a meeting may be called by a member of the executive or by:

(b) An officer calling a special meeting of the executive shall give at least forty-eight (48) hours notice of the meeting unless the meeting is called to deal with an emergency under IC 5-14-1.5-5.  The notice must include a specific statement of the purpose of the meeting, and the executive may not conduct any unrelated business at the meeting.