Wyo. Stat. § 41-4-313
Said superintendent shall also fix the time, both as to the day and hour, for the hearing of said contest, which date shall not be less than thirty (30) nor more than sixty (60) days from the date the notice is served on the party, association or corporation, which notice and the return thereof shall be made in the same manner as summons are served in civil actions in the district courts of this state. Superintendents of water divisions shall have power to adjourn hearings from time to time upon reasonable notice to all the parties interested, and to issue subpoenas and compel the attendance of witnesses to testify upon such hearings, which shall be served in the same manner as subpoenas issued out of the district courts of the state; and shall have the power to compel such witnesses so subpoenaed to testify and give evidence in said matter; said witnesses shall receive fees as in civil cases, to be paid by the party or parties against whom the contest shall be finally determined. The evidence on such proceedings shall be confined to the subjects enumerated in the notice of contest.
W.S. 41-4-313