(a) In discharging duties imposed under this title, an appeal tribunal established under this title, an examiner or other hearings officer employed or appointed by the commission or the executive director, a member of the commission, or a representative authorized by the commission may:
(1) administer oaths;
(2) take depositions;
(3) certify to official acts; and
(4) issue subpoenas to compel the attendance of witnesses and the production of books, papers, correspondence, memoranda, and other records considered necessary as evidence in connection with a disputed claim or the administration of this title.
(b) The commission's authority to conduct an investigation, assemble information, or require the submission of documentary or oral testimony is limited to the power necessary to properly administer this title.
(c) Notwithstanding Section 154.004, Local Government Code, or any other law, the executive director shall pay the fee of a sheriff or constable who serves a subpoena under this section. The fee shall be paid from the commission's administrative funds, and the comptroller shall issue a warrant for the fee as directed by the executive director.