Tex. Lab. Code § 52.041
(a) A person, firm, or corporation commits an offense if the person, firm, or corporation requires or attempts to require by coercion an employee to:
(b) A person, firm, or corporation commits an offense if the person, firm, or corporation excludes from work, punishes, or blacklists an employee for failure to:
Acts 1993, 73rd Leg., ch. 269, Sec. 1, eff. Sept. 1, 1993.