(a) The responsible professional shall unconditionally discharge a minor from treatment at any time that it is determined that the minor is no longer mentally ill or a substance abuser, or no longer in need of treatment at the facility.

(b) The legally responsible person may file a written request for discharge from the facility at any time.  The facility may hold the minor in the facility for 72 hours after receipt of the request for discharge.  If the responsible professional believes that the minor is mentally ill and dangerous to himself or others, he may file a petition for involuntary commitment under the provisions of Part 7 of this Article.  If the responsible professional believes that the minor is a substance abuser and dangerous to himself or others, he may file a petition for involuntary commitment under the provisions of Part 8 of this Article.  If an order authorizing the holding of the minor under involuntary commitment procedures is issued, further treatment and holding shall follow the provisions of Part 7 or Part 8 whichever is applicable.  If an order authorizing the holding of the minor under involuntary commitment procedures is not issued, the minor shall be discharged.

(c) If a client reaches age 18 while in treatment, and the client refuses to sign an authorization for continued treatment within 72 hours of reaching 18, he shall be discharged unless the responsible professional obtains an order to hold the client under the provisions of Part 7 or Part 8 of this Article pursuant to an involuntary commitment. (1975, c. 839; 1977, c. 756; 1979, c. 171, s. 1; 1983, c. 889, ss. 1, 2; 1985, c. 589, s. 2; 1987, c. 370, s. 1.)