CALIFORNIA FAMILY LAW
...Procedure Before Trial/Hearing
......Judicial Officers/Referees/Masters
.........Peremptory Challenge
............Master Calendar Rule
2 Cards On This Topic:

If master calendar assignment is made, challenge must be exercised not later than time case assigned.

When "master calendar" court doesn't assign ready case for trial, "master calendar rule" does not apply; 170.6 challenge may be timely under "10-day/5-day" or "all purpose assignment."