At any time prior to the filing of the final decision, the Hearing Examiner may reopen the proceeding to receive evidence that was unavailable at the time of the hearing. Such reopening may be initiated by a party of record requesting permission to present such evidence. The Hearing Examiner shall grant the request only upon a showing of significant relevance and good cause for delay in its submission. All parties of record will be given notice of the consideration of such evidence and granted an opportunity to review such evidence and file rebuttals.