California Code, Code of Civil Procedure - CCP § 911

A court of appeal may order any case on appealto a superior court in its district transferred to it for hearing and decision as provided by rules of the Judicial Council when the superior court certifies, or the court of appeal determines, that the transfer appears necessary to secure uniformity of decision or to settle important questions of law.

No case in which there is a right on appeal to a trial anew in the superior court shall be transferred pursuant to this section before a decision in the case becomes final therein.

A court to which any case is transferred pursuant to this section shall have similar power to review any matter and make orders and judgments as the appellate division of the superior court would have in the case, except that if the case was tried anew in the superior court,the court of appeal shall have similar power to review any matter and make orders and judgments as it has in a caseappealed pursuant to Section 904.1.