(1) An attorney appearing in proceedings before the board in a representative capacity shall conform to the Rules of Professional Conduct required of attorneys before the courts of Washington.

(2) A person other than an attorney appearing in a representative capacity or on his/her own behalf shall conform to the following standards as set forth in the Washington Court Rules of Professional Conduct, RCP 3.1 to 3.5.

(a) Advancing good faith claims and contentions;

(b) Making reasonable efforts to expedite the proceedings;

(c) Candor and truthfulness toward the board;

(d) Fairness to opposing parties; and

(e) Refraining from conduct that is detrimental to the impartiality of the board or the decorum of the proceedings.

(3) If any person does not conform to such rules, the board may decline to permit such person to appear in any current or future proceedings before the board or impose appropriate sanctions.