Unless required for the disposition of ex parte matters authorized by law, the President and the members of the Board or the agents of the Board shall not communicate, directly or indirectly, in connection with any issue of fact, with any person or party or his representative except upon notice and an opportunity for all parties to participate. The President and members of the Board may communicate with one another and have the aid and advice of one or more personal assistants. Advice may also, be secured from the attorney by the Board.
Okla. Admin. Code § 505:1-7-12