California Code, Code of Civil Procedure - CCP § 403

A judge may, on motion, transfer an action or actions from another court to that judge's court for coordination with an action involving a common question of fact or law within the meaning of Section 404.  The motion shall be supported by a declaration stating facts showing that the actions meet the standards specified in Section 404.1, are not complex as defined by the Judicial Council and that the moving party has made a good faith effort to obtain agreement to the transfer from all parties to each action.  Notice of the motion shall be served on all parties to each action and on each court in which an action is pending.  Any party to that action may file papers opposing the motion within the time permitted by rule of the Judicial Council.  The court to which a case is transferred may order the cases consolidated for trial pursuant to Section 1048 without any further motion or hearing.

The Judicial Council may adopt rules to implement this section, including rules prescribing procedures for preventing duplicative or conflicting transfer orders issued by different courts.