Tex. Government Code § 2001.092: DISCOVERY FROM PARTIES: IDENTITY OF WITNESS OR POTENTIAL PARTY; EXPERT REPORTS.

(a) The identity and location of a potential party or witness in a contested case may be obtained from a communication or other paper in a party's possession, custody, or control.

(b) A party may be required to produce and permit the inspection and copying of a report, including factual observations and opinions, of an expert who will be called as a witness.

(c) This section does not extend to other communications:

(1) made after the occurrence or transaction on which the contested case is based;

(2) made in connection with the prosecution, investigation, or defense of the contested case or the circumstances from which the case arose; and

(3) that are:

(A) written statements of witnesses;

(B) in writing and between agents, representatives, or employees of a party; or

(C) between a party and the party's agent, representative, or employee.

Added by Acts 1993, 73rd Leg., ch. 268, Sec. 1, eff. Sept. 1, 1993.