Conn. Agencies Regs. § 10-293-10
Unless required for the disposition of ex parte matters authorized by law, neither the board, executive director nor any hearing officer or state employee assigned to assist such officer shall communicate directly or indirectly with any person or party concerning any issue of fact or with any party in connection with any issue of law involved in a contested case that has been commenced under these rules, except upon notice and opportunity for all parties to participate. Any hearing officer and the board may communicate with each other ex parte and may have the aid and advice of such members of the board's staff as are assigned to assist them in such contested case. In a contested case, this rule shall not be construed to preclude such routine communications as are necessary to permit the board staff, not assigned to render a decision or to make findings of fact and conclusions of law in a contested case, to investigate facts and to conduct the informal conferences that may be held pursuant to these rules of practice at any time before, during and after the hearing thereof.
Conn. Agencies Regs. § 10-293-10