The purpose of the special meeting must be set forth in the petition in order to indicate the basis for the requested special meeting. Regular meeting agendas must be posted 72 hours prior to their start time and Special Meeting agendas posted 24 hours prior.The articles or bylaws may not dispense with notice of a special meeting. A notice, or waiver of notice, need not specify the purpose of any regular or special meeting of the board. The special meeting notice must also be posted at least 24 hours prior to the special meeting in a site freely accessible to the public. At a regular meeting, the public is also permitted to comment on matters not on the agenda. The corporation can allow others to call a special meeting, such as the BoD Chair, CEO, or yes, shareholders. The bylaws or CoI needs to specify this, though.