This subchapter applies to:(1) residential treatment center (RTC) providers that contract with the Texas Health and Human Services Commission to provide RTC Project services;(2) local mental health authorities and local behavioral health authorities, with RTC Project administrative responsibilities; and(3) a child, and their legally authorized representative, who:(A) meet eligibility criteria as provided in §307.207 of this subchapter (relating to Eligibility Criteria to Participate in the RTC Project); and(B) are applicants or recipients of services from the RTC Project.