Wyo. Stat. § 17-10-107
The certificate of incorporation of any association organized under this act or which may elect to come under the provisions of this act may be amended in the following manner: the board of directors, by majority vote of its members, may pass a resolution setting forth the full text of the proposed amendment and also the full text of such section or sections as may be altered or repealed by such amendments. Upon such action by the board of directors, notice shall be mailed to each and every member containing a copy of the resolution so adopted, the full text of the proposed amendment and also the full text of such section or sections as will be altered or repealed by such amendment. Such notice shall also designate the time, not less than twenty (20) days from the mailing of such notice, and place of the meeting at which such proposed amendment shall be considered and voted upon. If a quorum of the members is registered as being present or represented by mail votes at such meeting, a majority of the members so present or represented by mail votes may adopt or reject such proposed amendment; provided that no amendment may be adopted inconsistent with W.S. 17-10-104. Such amendments shall be put into effect by the directors, who shall sign and acknowledge and file, as above provided by the general corporation law of this state, new or revised certificates containing such amendments and superseding the original certificate.
W.S. 17-10-107