(1) involuntary commitment under the provisions of Section 62A-5-312. Proceedings for involuntary commitment of an individual under 18 years of age may be commenced by filing a written petition with the juvenile court under Section 62A-5-312. The juvenile court has jurisdiction to proceed in the same manner and with the same authority as the district court; or
(2) an emergency commitment in accordance with the provisions of Section 62A-5-311.