A certificate of assumption may be attached only to an automobile insurance policy issued for an insurer for which a reinsurance assumption agreement has been approved by a commissioner's order pursuant to 28 Texas Administrative Code §7.604. For utilization under this section, the Texas Department of Insurance adopts by reference a certificate of assumption form which is published by the Texas Department of Insurance and available from the Automobile Division, P.O. Box 149104, Mail Code 104-1A, Austin, Texas 78714-9104.