(a) The presiding officer may at the beginning of any proceeding and during the course of that proceeding establish rules of decorum to be followed during the proceeding. The presiding officer may also establish times for beginning the proceeding, for recesses, and for ending the proceeding.(b) Parties and participants in a proceeding shall conduct themselves with dignity, shall show courtesy and respect for one another and for the presiding officer, shall follow the decorum prescribed by the presiding officer at the proceeding, and shall adhere to the beginning times of the proceeding, and to the times established for each recess and for ending the proceeding.(c) To maintain and enforce proper conduct and decorum at a proceeding, and to enforce promptness at a proceeding, the presiding officer may take appropriate action, including, but not limited to:(1) issuing a warning;(2) excluding any person from the proceeding;(3) recessing the proceeding; and(4) referring an action for possible enforcement as an administrative violation.