Sec. 389.001. DEFINITION. In this chapter, "commission" means the Texas Commission on Environmental Quality. Added by Acts 2001, 77th Leg., ch. 967, Sec. 1(b), eff. Sept. 1, 2001. Amended by: Acts 2025, 89th Leg., R.S., Ch. 986 (S.B. 766), Sec. 27, eff. September 1, 2025.