Cal. Lab. Code § 5903
At any time within 20 days after the service of any final order, decision, or award made and filed by the appeals board or a workers’ compensation judge granting or denying compensation, or arising out of or incidental thereto, any person aggrieved thereby may petition for reconsideration upon one or more of the following grounds and no other:
(e) That the findings of fact do not support the order, decision, or award.
Nothing contained in this section shall limit the grant of continuing jurisdiction contained in Sections 5803 to 5805, inclusive.