Any time prior to issuance of its final decision pursuant to § 12.406, the Commission may, after notice to the parties and an opportunity for them to present their views, reopen the hearing to receive further evidence. The application shall show to the satisfaction of the Commission that the additional evidence is material, and that there were reasonable grounds for failure to adduce such evidence at the hearing. The Commission may receive the additional evidence or may remand the proceeding to the Administrative Judge or Administrative Law Judge to receive the additional evidence.