The statute says “where the litigation is proposed to be filed.” That of course would be the Superior Court. Yet, the matter will be reviewed by the Court of Appeal.
391.7. (a) In addition to any other relief provided in this title,
the court may, on its own motion or the motion of any party, enter a
prefiling order which prohibits a vexatious litigant from filing any
new litigation in the courts of this state in propria persona without
first obtaining leave of the presiding justice or presiding judge of
the court where the litigation is proposed to be filed.