Cal. Gov. Code § 87404

Upon the petition of any interested person or party, the court or the presiding or other officer, including but not limited to a hearing officer serving pursuant to Section 11512 of the Government Code, in any judicial, quasi-judicial or other proceeding, including but not limited to any proceeding pursuant to Chapter 5 (commencing with Section 11500) of Part 1 of Division 3 of Title 2 of the Government Code may, after notice and an opportunity for a hearing, exclude any person found to be in violation of this article from further participation, or from assisting or counseling any other participant, in the proceeding then pending before such court or presiding or other officer.