In this chapter:
(1) “Commission” means the Health and Human Services Commission.
(2) “Executive commissioner” means the executive commissioner of the commission.
(3) “Psychiatric residential youth treatment facility” means a private facility that provides psychiatric health treatments and services in a residential, nonhospital setting exclusively to individuals who are 21 years of age or younger and is licensed as a general residential operation under Chapter 42, Human Resources Code. The term includes a facility that provides room and board.
(4) “Severe emotional disturbance” means a mental, behavioral, or emotional disorder of sufficient duration to result in functional impairment that substantially interferes with or limits an individual’s role or ability to function in family, school, or community activities.