§ 166.1.Request for interlocutory order that appellate resolution of controlling question of law would advance litigation

Section 166.1 gives a trial judge a narrow, non-binding way to flag a case for possible early appellate attention. On a party’s written request, or on the judge’s own initiative, the judge can add a notation to an interlocutory order stating a belief that the order involves a controlling question of law on which reasonable judges could disagree, and that getting an appellate court’s answer now could meaningfully move the case toward resolution.

The notation itself does not create a right to appeal or seek writ review — it signals to a reviewing court that the trial judge sees the issue as significant enough to warrant a closer look, which can matter when a party is asking the appellate court to exercise its discretion to hear an interlocutory writ petition. The section is equally clear about what cannot be appealed: neither a judge’s refusal to add the notation, nor another party’s objection to including it, gives rise to an independent basis for a writ or appeal.