Rule 3.900.Purposes of reference
Division 9. References · Chapter 1. Reference by Agreement of the Parties Under Code of Civil Procedure Section · Adopted 2007 · no amendments on record · Last verified July 29, 2026
Full Text of Rule 3.900
Plain-English Summary
Rule 3.900 opens Division 9 by drawing a line between two very different roles a private, court-appointed professional can play. Section 638 lets parties stipulate to a referee who hears evidence, decides issues, and reports back to the court — an adjudicative substitute for a judge. Mediation is something else: a facilitated, confidential negotiation with no one deciding anything. This rule keeps a court from blurring the two by using the section 638 process to hand someone a mediation assignment.
That does not shut the door on every overlap between reference and mediation. A court can still appoint a referee to run a mandatory settlement conference, since that is a different function than a full reference on the merits. And someone who served as a referee in a case is free to go on and mediate that same dispute once the reference itself is finished — the restriction is on using section 638 to create a mediation appointment in the first place, not on who can later become a mediator.
Advisory Committee Comment
The following comment is published by the Judicial Council of California alongside the rule itself — not commentary from this site.
Rule 3.900 is not intended to prohibit a court from appointing a referee to conduct a mandatory settlement conference or, following the conclusion of a reference, from appointing a person who previously served as a referee to conduct a mediation.
Frequently Asked Questions
Can a court appoint a referee under section 638 to mediate a case?
No. Rule 3.900 bars using the section 638 reference procedure to appoint someone to conduct a mediation.
Can a referee run a settlement conference instead?
Yes. The restriction targets mediation appointments specifically; it does not stop a court from appointing a referee to conduct a mandatory settlement conference.
Can a former referee later mediate the same case?
Yes, once the reference has concluded, a court may appoint that same person to mediate — rule 3.900 only bars using section 638 itself to make a mediation appointment.
Amendment History
Rule 3.900 adopted effective January 1, 2007.