Tex. Lab. Code § 410.006
(a) A claimant may be represented at a benefit review conference, a contested case hearing, or arbitration by an attorney or may be assisted by an individual of the claimant's choice who does not work for an attorney or receive a fee. An employee of an attorney may represent a claimant if that employee:
Acts 1993, 73rd Leg., ch. 269, Sec. 1, eff. Sept. 1, 1993.