California Labor Codes 4907 582
§ Removal of privilege to represent party
(a)�The privilege of any person, except attorneys admitted to practice in the Supreme Court of the state, to appear in any proceeding as a representative of any party before the appeals board, or any of its workers� compensation administrative law judges, may, after a hearing, be removed, denied, or suspended by the appeals board for either of the following:
(1)�For a violation of this chapter, the Rules of the Workers� Compensation Appeals Board, or the Rules of the Administrative Director. (2)�For other good cause, including, but not limited to, failure to pay final order of sanctions, attorney�s fees, or costs issued under Section 5813. (b)�For purposes of this section, nonattorney representatives shall be held to the same professional standards of conduct as attorneys.