California Code, Labor Code - LAB § 6621

If at the time of granting reconsideration, it appears to the satisfaction of the appeals board that no sufficient reason exists for taking further testimony, the appeals board may affirm, rescind, alter or amend the order or decision made and filed by the appeals board or hearing officer and may, without further proceedings, without notice, and without setting a time and place for further hearing, enter its findings, order or decision based upon the record in the case.