A witness who is not a party to the proceeding and who is subpoenaed to appear at a deposition or hearing or to produce documents, records, or other tangible things, shall receive reimbursement for expenses incurred in complying with the subpoena. Reimbursement shall be in accordance with Government Code, § 2001.103. Said amount shall be paid by the party at whose request the witness is subpoenaed.
22 Tex. Admin. Code § 343.21