|(a) Comportment. All parties, witnesses, attorneys, and other representatives shall conduct themselves during all agency proceedings with dignity, courtesy, and respect for the agency, its hearing examiner, and all other parties and participants. Attorneys shall observe all rules of professional and ethical behavior prescribed for the profession by the Code of Professional Responsibility. (b) Compliance. Any party, witness, attorney, or other representative who violates subsection (a) of this section may be excluded by the agency from any proceeding or may be subject to such other reasonable and lawful disciplinary action as the agency may prescribe.