Tex. Hum. Res. Code § 91.0211

The Texas Workforce Commission has primary responsibility for providing vocational rehabilitation services and other services and programs under Subtitle C, Title 4, Labor Code, notwithstanding Section 91.021(a) and subject to receipt of any required federal approval to administer those services and programs. A power or duty under this chapter, including rulemaking authority, of the department, the commissioner, or the executive commissioner that is applicable to those services or programs is a power or duty of the Texas Workforce Commission with respect to those services or programs.