|(a) All parties to a formal contested case hearing shall be mailed written notice at least 15 calendar days before the date set for the hearing. The notice shall include: (1) a statement of time, place, and nature of the hearing; (2) a statement of the legal authority and jurisdiction under which the hearing is to be held; (3) a reference to the particular section of the statutes and rules involved; and (4) a short and plain statement of the matters asserted. The petitioner may satisfy this requirement by incorporating the petition by reference in the notice of hearing. (b) If the petition was initiated by the Commissioner, service may be made by sending the notice to the party's last known address as shown by the Board's records. If the petition was initiated by a party other than the Commissioner, notice will be mailed to the address on that party's most recently filed pleading.