The heading of the subpoena shall be "The State Office of Administrative Hearings." It shall state the style of the hearing, that the hearing is pending before SOAH, the time and place at which the witness is required to appear, and the party at whose insistence the witness is summoned. It shall be signed by the judge, but need not be under the seal of SOAH and the date of issuance shall be noted thereon. It may be made returnable forthwith, or on any date for which hearing of the docketed matter may be set. It shall be addressed to any sheriff or constable of the State of Texas or other person authorized to serve subpoenas as provided in Rule 178, Texas Rules of Civil Procedure.
30 Tex. Admin. Code § 80.155