Tex. Labor Code § 21.053: DISCRIMINATION BY LABOR ORGANIZATION.

A labor organization commits an unlawful employment practice if because of race, color, disability, religion, sex, national origin, or age the labor organization:

(1) excludes or expels from membership or discriminates in any other manner against an individual; or

(2) limits, segregates, or classifies a member or an applicant for membership or classifies or fails or refuses to refer for employment an individual in a manner that would:

(A) deprive or tend to deprive an individual of any employment opportunity;

(B) limit an employment opportunity or adversely affect in any other manner the status of an employee or of an applicant for employment; or

(C) cause or attempt to cause an employer to violate this subchapter.

Acts 1993, 73rd Leg., ch. 269, Sec. 1, eff. Sept. 1, 1993.