(b) At no stage of the proceeding following the issuance of a notice of hearing and prior to the issuance of the Secretary's decision thereon shall an employee of the Department who is or may reasonably be expected to be involved in the decision process of the proceeding discuss ex parte the merits of the proceeding with any person having an interest in the proceeding or with any representative of such person. This prohibition does not include communications about:

1. (1) Procedural matters and status reports.
2. (2) The merits of the proceeding if all parties known to be interested in the proceeding have been given notice and an opportunity to participate. A memorandum of any such discussion shall be included in the record of the proceeding.

(d) If an employee of the Department who is or may reasonably be expected to be involved in the decisional process of the proceeding receives or makes or knowingly causes to be made a communication prohibited by this section, the Department shall place on the public record of the proceeding:

1. (1) All such written communications;
2. (2) Memoranda stating the substance of all such oral communications; and
3. (3) All written responses, and memoranda, stating the substance of all oral responses thereto.