Cal. Civ. Proc. Code § 404.3

A judge assigned pursuant to Section 404 who determines that coordination is appropriate shall order the actions coordinated, report that fact to the Chairperson of the Judicial Council, and the Chairperson of the Judicial Council shall either assign a judge to hear and determine the actions in the site or sites the assigned judge finds appropriate or authorize the presiding judge of a court to assign the matter to judicial officers of the court in the same manner as assignments are made in other civil cases.