020-4 Wyo. Code R. § 4-1
(a) Any party seeking any change in any decision of the Council may file a petition for rehearing within twenty (20) days after the written decision of the Council has been issued.
(b) Any petition for rehearing filed under this section must be confined to new questions raised by the decision and upon which the petitioner had no opportunity to argue before the Council.
(c) Any petition for rehearing must specify whether the prayer is for reconsideration, rehearing, further hearing, modification of effective date, vacation, suspension or otherwise.
(d) Except as the Council may otherwise direct, the filing of a petition under this section shall not stay the effectiveness of any decision respecting the promulgation, amendment, or repeal of any rule or rules.
020-4 Wyo. Code R. § 4-1