805 ILCS 5/8.25: Notice of directors' meetings.

Meetings of the board of directors shall be held upon such notice as the by-laws may prescribe. Attendance of a director at any meeting shall constitute a waiver of notice of such meeting except where a director attends a meeting for the express purpose of objecting to the transaction of any business because the meeting is not lawfully called or convened. Neither the business to be transacted at, nor the purpose of, any regular or special meeting of the board of directors need be specified in the notice or waiver of notice of such meeting.