This part shall be construed to promote the legislative intent and purposes of this part as follows:

1. (a) To provide prompt evaluation and treatment of minors with a mental health disorder, with particular priority given to a child or adolescent with serious emotional disturbance.
2. (b) To safeguard the rights to due process for minors and their families through judicial review.
3. (c) To provide individualized treatment, supervision, and placement services for minors with a grave disability.
4. (d) To prevent severe and long-term mental disabilities among minors through early identification, effective family service interventions, and public education.