Sec. 21.152. CONDUCT OF INVESTIGATION, INQUIRY, OR HEARING. A member of the commission, the director, or an officer or employee of the department who has been designated by the commission to hold an investigation, inquiry, or hearing may: (1) administer an oath; (2) certify an official act; (3) issue a subpoena; (4) order the attendance and testimony of a witness; or (5) order the production of a paper, book, or document. Acts 1995, 74th Leg., ch. 165, Sec. 1, eff. Sept. 1, 1995.