If the petitioner applies to the court for leave to adduce additional data, views, or arguments and shows to the satisfaction of the court that such additional data, views, or arguments are material and that there were reasonable grounds for the petitioner’s failure to adduce such data, views, or arguments in the proceeding before the Commission, the court may order the Commission to provide additional opportunity for the oral presentation of data, views, or arguments and for written submissions. The Commission may modify its findings, or make new findings by reason of the additional data, views, or arguments so taken and shall file such modified or new findings, and its recommendation, if any, for the modification or setting aside of its original rule, with the return of such additional data, views, or arguments.