Wyo. Stat. § 21-6-203: District boundary boards; membership; style.

The county assessor, the board of county commissioners and the county treasurer shall constitute a board for establishing school districts in the county. If two (2) or more counties are involved, the county assessor, the board of county commissioners and the county treasurer from each county shall comprise the board. The board shall be styled "the district boundary board of .... county or counties, Wyoming."