Tex. Ins. Code § 1551.068

Notwithstanding any provision of this chapter or any other law, it is intended that the provisions of this chapter be construed and administered in a manner that coverages under the group benefits program will be considered in compliance with applicable federal law. The board of trustees may adopt rules that modify the coverage provided under the program by adding, deleting, or changing a provision of the program, including rules that modify eligibility and enrollment requirements and the benefits available under the program.