Cal. Welfare and Institutions Code § 650 : California Welfare And Institutions Code — Children — Juvenile Court Law — Wards-Commencement Of Proceedings — Petition filed commencing proceedings Date: 15 Sep 2016 TEXT PDF Current through the 2016 Legislative Session (a) Juvenile court proceedings to declare a minor a ward of the court pursuant to Section 601 are commenced by the filing of a petition by the probation officer except as specified in subdivision (b). (b) Juvenile court proceedings to declare a minor a ward of the court pursuant to subdivision (e) of Section 601.3 may be commenced by the filing of a petition by the probation officer or the district attorney after consultation with the probation officer. (c) Juvenile court proceedings to declare a minor a ward of the court pursuant to Section 602 are commenced by the filing of a petition by the prosecuting attorney. Ca. Welf. and Inst. Code § 650