211-3 Wyo. Code R. § 3-15
(a) Any party who so desires need not personally appear at the oral argument and may upon written notice to the Board rely solely upon the information provided in the parties notice of appeal, and written briefs as submitted.
(b) The Board may order consideration of the matter on the record and written briefs. If such order is issued, the parties have ten (10) days from the date of the order to request oral argument or the same shall be deemed waived. The briefing order shall allow thirty (30) days for the filing and service of initial brief, thirty (30) days for the filing and service of the response brief and fifteen (15) days for filing and service a reply brief. An original and four copies of any brief shall be filed with the Board and a copy thereof served on every other party to the appeal. Upon expiration of the time for filing reply briefs, the matter shall be deemed closed and will be taken under advisement for rendition of a written decision.
211-3 Wyo. Code R. § 3-15