Tex. Fam. Code § 263.606

An attorney ad litem or guardian ad litem appointed for a young adult who receives services in the young adult's own home from a service provider or resides in an institution that is licensed, certified, or verified by a state agency other than the department shall assist the young adult as necessary to ensure that the young adult receives appropriate services from the service provider or institution, or the state agency that regulates the service provider or institution.