Wyo. Stat. Ann. § 17-20-1103

Unless this act, the articles, bylaws or the board of directors or members, acting pursuant to W.S. 17-19-1103(c) require a greater vote, a plan of merger involving two (2) or more cooperative utilities to be adopted shall be approved as provided by W.S. 17-19-1103(a)(i) and (iii) and by the affirmative vote of not less than a majority of all of the members of each of the merging cooperative utilities.