Wyo. Stat. Ann. § 41-4-327

After any final order of the board of control adjudicating the priorities upon any stream, any party interested therein may within one (1) year thereafter apply for a rehearing for reasons to be stated in the application; and upon the filing of such application, the secretary of the board shall mail written notice thereof to every other party interested, and therein fixing and stating a time when said application will be heard.