A majority of the members of the planning commission shall constitute a quorum. Meetings of the commission shall be open to the public. Meetings other than at regularly scheduled times may be announced at a prior meeting and thereby be made a part of the meeting records. The chair upon their own motion may, or at the request of three members of the commission shall, by giving notice to members of the commission, call a previously unannounced special meeting of the commission for a time not earlier than twenty-four (24) hours after the notice is given. (Prior code § 10.030)