Cal. R. 10.910
In a court employing the master calendar, each case transferred to a trial department must be tried, ordered off the calendar, or dismissed unless, for good cause arising after the commencement of the trial, the judge of the trial department continues the case for further hearing or, with the consent of the judge supervising the master calendar, reassigns the case to the judge supervising the master calendar for further disposition.
A judge who has finished or continued the trial of a case or any special matter must immediately notify the judge supervising the master calendar. The judge to whose department a cause is assigned for trial or for hearing must accept the assignment unless disqualified or, for other good cause stated to the judge supervising the master calendar, the judge supervising the master calendar determines that in the interest of justice the cause should not be tried or heard before the judge. When the judge has refused a cause and is not disqualified, the judge must state the reasons in writing unless the judge supervising the master calendar has concurred.
Cal. R. Ct. 10.910