Tex. Hum. Res. Code § 223.003
If necessary, the board by rule may provide for:
(3) the application of Section 223.001 to a multi-county jurisdiction.
Redesignated and amended from Human Resources Code, Subchapter E, Chapter 141 by Acts 2011, 82nd Leg., R.S., Ch. 85 (S.B. 653), Sec. 1.004, eff. September 1, 2011.