California Code, Labor Code - LAB § 5808

The appeals board or a member thereof may stay the execution of any judgment entered upon an order, decision, or award of the appeals board, upon good cause appearing therefor and may impose the terms and conditions of the stay of execution. A certified copy of such order shall be filed with the clerk entering judgment. Where it is desirable to stay the enforcement of an order, decision, or award and a certified copy thereof and of the findings has not been issued, the appeals board or a member thereof may order the certified copy to be withheld with the same force and under the same conditions as it might issue a stay of execution if the certified copy had been issued and judgment entered thereon.