Texas Property Code - PROP § 77.303. Authority to Take Testimony and Issue Administrative Subpoenas

(a) In addition to the authority to examine granted by Section 77.302, to enforce this chapter and to determine whether reports have been made as required by this chapter, the comptroller, or the comptroller's designee, may take testimony, administer oaths, and issue subpoenas to compel any person, at a time and place reasonable under the circumstances, to appear and give testimony, and to produce relevant books, records, documents, or other data, in whatever form, for audit, inspection, and copying.

(b) A person authorized to serve process under the Texas Rules of Civil Procedure may serve a subpoena issued under Subsection (a).  The person shall serve the subpoena in accordance with the Texas Rules of Civil Procedure.