Notice of a hearing to be held under section 777 must be issued and served as provided in sections 658, 660, and 777 and prepared:
If the probation officer files the notice of hearing, before jeopardy attaches the prosecuting attorney may move the court to dismiss the notice and request that the matter be referred to the probation officer for appropriate action under section 777(a)(3).
If the child has been brought into custody, the procedures described in rules 5.524 and 5.752 through 5.764 must be followed.
Before every hearing the probation officer must prepare a report on those matters relevant to a determination of whether the child has violated a condition of probation. The report must be furnished to all parties at least 48 hours, excluding noncourt days, before the beginning of the hearing unless the child is represented by counsel and waives the right to service of the report.
The court must consider the report prepared by the probation officer and other relevant and material evidence offered by the parties to the proceeding.
Cal. R. Ct. 5.580