Tex. Occupations Code § 901.158: RULES RESTRICTING COMPETITIVE PRACTICES.

The board in its rules of professional conduct may regulate the competitive practices of a license holder as necessary to ensure that the license holder does not engage in a competitive practice that:

(1) impairs the independence or quality of a service provided by a license holder;

(2) impairs or restricts the public's opportunity to obtain professional accounting services of high quality at a reasonable price; or

(3) unreasonably restricts competition among license holders.

Acts 1999, 76th Leg., ch. 388, Sec. 1, eff. Sept. 1, 1999. Amended by Acts 2001, 77th Leg., ch. 1497, Sec. 7, eff. Sept. 1, 2001.