California Code, Code of Civil Procedure - CCP § 404.4

The presiding judge of any court in which there is pending an action sharing a common question of fact or law with actions coordinated pursuant to Section 404, on the court's own motion or the motion of any party supported by an affidavit stating facts showing that the action meets the standards specified in Section 404.1, or all the parties plaintiff or defendant in any such action, supported by an affidavit stating facts showing that the action meets the standards specified in Section 404.1, may request the judge assigned to hear the coordinated actions for an order coordinating the action. Coordination of the action shall be determined under the standards specified in Section 404.1.