California Code, Code of Civil Procedure - CCP § 1068

(a) A writ of review may be granted by any court when an inferior tribunal, board, or officer, exercising judicial functions, has exceeded the jurisdiction of such tribunal, board, or officer, and there is no appeal, nor, in the judgment of the court, any plain, speedy, and adequate remedy.

(b) The appellate division of the superior court may grant a writ of review directed to the superior court in a limited civil case or in a misdemeanor or infraction case.  Where the appellate division grants a writ of review directed to the superior court, the superior court is an inferior tribunal for purposes of this chapter.