Tennessee Code Title 4. State Government § 4-21-309

(a)(1) Upon written application to the commission, a party to a proceeding is entitled as of right to the issuance of subpoenas for deposition or hearing in the name of the commission by an individual designated pursuant to its rules requiring attendance and the giving of testimony by witnesses and the production of documents.

(2) A subpoena issued pursuant to subdivision (a)(1) must show on its face the name and address of the party at whose request the subpoena is directed.

(3) Upon the petition of the person to whom the subpoena is directed and upon notice to the requesting party, the commission or an individual designated pursuant to its rules may vacate or modify the subpoena.

(4) Depositions of witnesses must be taken in accordance with the Tennessee Rules of Civil Procedure.

(5) Witnesses whose depositions are taken, or who are summoned before the commission or its agents, are entitled to the same witness and mileage fees as are paid to the witnesses subpoenaed in chancery court.