In Re Melvin J.

On March 7, 2000, the. voters approved an initiative measure designated on the ballot as Proposition 21. This measure took effect on March 8, 2000, the day following the election. (Cal. Const., art. II, § 10, subd. (a).) Proposition 21, known as the Gang Violence and Juvenile Crime Prevention Act of 1998, made numerous changes to the Penal Code and Welfare and Institutions Code relating to the adult and juvenile justice systems, including the treatment of juvenile offenders, the confidentiality protections afforded to juvenile proceedings, the type of juvenile offenders ■ that can be tried in adult court, and the punishment for gang-related offenses and offenders. Of particular relevance to the instant case is section 27 of Proposition 21, which amended Welfare and Institutions Code section 777 by deleting the requirement of a supplemental petition when modifying a previous order to impose a more restrictive type of custody, including commitment to the California Youth Authority. Section 27 also deleted in its entirety Welfare and Institutions Code section 777, subdivision (e) which had created an exception to the supplemental petition procedure where an order imposing…