This rule applies to all subordinate judicial officers except those acting as child support commissioners under Family Code section 4251.
The primary role of subordinate judicial officers is to perform subordinate judicial duties. However, a presiding judge may assign a subordinate judicial officer to sit as a temporary judge where lawful, if the presiding judge determines that, because of a shortage of judges, it is necessary for the effective administration of justice.
Cal. R. Ct. 10.700