When a judge or panel of the Court of Appeals for Veterans
Claims, in making an order not otherwise appealable under this section, determines that a controlling question of law is involved with respect to which there is a substantial ground for difference of opinion and that there is in fact a disagreement between the appellant and the Secretary
with respect to that question of law and that the ultimate termination of the case may be materially advanced by the immediate consideration of that question, the judge or panel shall notify the chief judge of that determination. Upon receiving such a notification, the chief judge shall certify that such a question is presented, and any party to the case may then petition the Court of Appeals for the Federal Circuit to decide the question. That court may permit an interlocutory appeal to be taken on that question if such a petition is filed with it within 10 days after the certification by the chief judge of the Court of Appeals for Veterans
Claims. Neither the application for, nor the granting of, an appeal under this paragraph shall stay proceedings in the Court of Appeals for Veterans
Claims, unless a stay is ordered by a judge of the Court of Appeals for Veterans
Claims or by the Court of Appeals for the Federal Circuit.