California Code of Regulations
Title 8 - Industrial Relations
Division 1 - Department of Industrial Relations
Chapter 4.5 - Division of Workers' Compensation
Subchapter 2 - Workers' Compensation Appeals Board-Rules and Practice Procedure
Article 4 - Conduct of Parties, Attorneys and Non-Attorney Representatives
Section 10430 - Vexatious Litigants

(a) For purposes of this rule, "vexatious litigant" means:

(b) Upon the petition of a party, or upon the motion of any workers' compensation judge or the Appeals Board, a presiding workers' compensation judge of any district office having venue or the Appeals Board may declare a party to be a vexatious litigant.

(c) No party shall be declared a vexatious litigant without being given notice and an opportunity to be heard. If a hearing is requested, the presiding workers' compensation judge or the Appeals Board, in their discretion, either may take and consider both oral and documentary evidence or may take and consider solely documentary evidence, including affidavits or other written declarations of fact made under penalty of perjury.

(d) If a party is declared to be a vexatious litigant, a presiding workers' compensation judge or the Appeals Board may enter a "prefiling order," i.e., an order which prohibits the vexatious litigant from filing, in propria persona, any Application for Adjudication of Claim, Declaration of Readiness to Proceed, petition or other request for action by the Workers' Compensation Appeals Board without first obtaining leave of the presiding workers' compensation judge of the district office where the request for action is proposed to be filed or, if the matter is pending before the Appeals Board on a petition for reconsideration, removal or disqualification, without first obtaining leave from the Appeals Board. For purposes of this rule, a "petition" shall include, but not be limited to, a petition to reopen under Labor Code sections 5410, 5803 and 5804, a petition to enforce a medical treatment award, a penalty petition or any other petition seeking to enforce or expand the vexatious litigant's previously determined rights.

(e) If a vexatious litigant proposes to file, in propria persona, any Application for Adjudication of Claim, Declaration of Readiness to Proceed, petition or other request for action by the Workers' Compensation Appeals Board, the request for action shall be conditionally filed. Thereafter, the presiding workers' compensation judge, or the Appeals Board if the petition is for reconsideration, removal or disqualification, shall deem the request for action to have been properly filed only if it appears that the request for action has not been filed in violation of subdivision (a). In determining whether the vexatious litigant's request for action has not been filed in violation of subdivision (a), the presiding workers' compensation judge, or the Appeals Board, shall consider the contents of the request for action and the Workers' Compensation Appeals Board's existing record of proceedings, as well as any other documentation that, in its discretion, the presiding workers' compensation judge or the Appeals Board asks to be submitted. Among the factors that the presiding workers' compensation judge or the Appeals Board may consider is whether there has been a significant change in circumstances (such as new or newly discovered evidence or a change in the law) that might materially affect an issue of fact or law that was previously finally determined against the vexatious litigant.

(f) If any in propria persona Application for Adjudication of Claim, Declaration of Readiness to proceed, petition or other request for action by the Workers' Compensation Appeals Board from a vexatious litigant subject to a prefiling order is inadvertently accepted for filing (other than conditional filing in accordance with subdivision (e) above), then any other party may file (and shall concurrently serve on the vexatious litigant and any other affected parties) a notice stating that the request for action is being submitted by a vexatious litigant subject to a prefiling order as set forth in subdivision (d). The filing of the notice shall automatically stay the request for action until it is determined, in accordance with subdivision (e), whether the request for action should be deemed to have been properly filed.

(g) A copy of any prefiling order issued by a presiding workers' compensation judge or by the Appeals Board shall be submitted to the Secretary of the Appeals Board, who shall maintain a record of vexatious litigants subject to those prefiling orders and who shall annually disseminate a list of those persons to all presiding workers' compensation judges.