(a) The commission shall meet in regular session quarterly at a time and place in the State of Alabama to be designated in its bylaws. Special meetings may be called by the chairman, the vice-chairman or any three members by giving notice of the time, place and purposes of such special meeting at least five days before it is to be held to each member of the commission. Such notice may be waived by all members of the commission, either before or after a special meeting.
(b) The commission shall adopt an official seal, and the executive secretary shall be custodian of the seal and shall have authority to affix the seal to agreements and obligations of the commission and to certified copies of proceedings of the commission.