Wyo. Stat. § 41-6-302
In cases when suits for injunction are brought affecting the use of water from streams upon which the rights to the use of water have been adjudicated, no restraining order shall be granted by the court, judge or court commissioner, before hearing had after at least three (3) days notice thereof, served upon all persons defendant. All suits for injunction involving the use of water from streams shall be heard, either in term time or during vacation as the case may be, not later than fifteen (15) days after issues joined. In no case shall an injunction or restraining order be issued or become operative until the party obtaining the same executes an undertaking, to the defendants, with good and sufficient surety, to be approved by the clerk of the court granting the same, in an amount fixed by court, judge or commissioner allowing the same, conditioned to secure to the party enjoined all actual damages he may sustain if it be finally decided that the injunction or restraining order ought not to have been granted.
W.S. 41-6-302