Welfare and Institutions Code § 386
ARTICLE 12. Dependent Children—Modification of Juvenile Court Judgments and Orders
No order changing, modifying, or setting aside a previous order of the juvenile court shall be made either in chambers, or otherwise, unless prior notice of the application therefor has been given by the judge or the clerk of the court to the social worker and to the child’s counsel of record, or, if there is no counsel of record, to the child and his or her parent or guardian.