The trial judge must preserve and deliver to the clerk for inclusion in the record all written communications, formal or informal, received from the jury or from individual jurors or sent by the judge to the jury or individual jurors, from the time the jury is sworn until it is discharged.
The trial judge must ensure that the reporter, or any electronic recording system used instead of a reporter, records all oral communications, formal or informal, received from the jury or from individual jurors or communicated by the judge to the jury or individual jurors, from the time the jury is sworn until it is discharged.
Cal. R. Ct. 2.1030