020-6 Wyo. Code R. § 6-4
(a) Where an appeal to the Council of the Administrator's decision is afforded, a petition should be filed with the Council within the time provided by law. This proceeding will be stayed if an informal conference with the Director is requested until the Director has made his determination. If the petitioner is not satisfied with the Director's determination, he shall inform the Council that he wishes to proceed with appeal to the Council. The Council shall conduct the hearing as if the informal hearing had not occurred, provided however, that the Director's decision may be introduced into evidence.
(b) At formal review proceedings before the Council, no evidence as to statements made or evidence produced by one participant at a conference shall be introduced as evidence by another participant.
020-6 Wyo. Code R. § 6-4