199—7.22 (17A,476) Ex parte communication. Ex parte communication is prohibited as provided in Iowa Code section 17A.17. Parties or their representatives shall not communicate directly or indirectly with the board or presiding officer in connection with any issue of fact or law in a contested case except upon notice and an opportunity for all parties to participate. The board or presiding officer shall not communicate directly or indirectly with parties or their representatives in connection with any issue of fact or law in a contested case except upon notice and an opportunity for all parties to participate.