Cal. Lab. Code § 4905

Where it appears in any proceeding pending before the appeals board that a lien should be allowed if it had been duly requested by the party entitled thereto, the appeals board may, without any request for such lien having been made, order the payment of the claim to be made directly to the person entitled, in the same manner and with the same effect as though the lien had been regularly requested, and the award to such person shall constitute a lien against unpaid compensation due at the time of service of the award.