No motion for leave to reopen a hearing because of newly discovered evidence shall be entertained unless it is shown that such additional evidence is material, that the motion has been timely made and that there were reasonable grounds for the failure to adduce such evidence at the hearing. Nothing contained in this section shall be deemed to limit the right and power of the board in its discretion and on its own motion to reopen a hearing and take further testimony.
Conn. Agencies Regs. § 5-273-66