Wyo. Stat. § 17-19-704: Action by written consent.

(a) Unless limited or prohibited by the articles or bylaws, action required or permitted by this act to be taken at a members' meeting may be taken without a meeting if notice of the proposed action is given to all voting members and the action is approved by ninety percent (90%) of the members entitled to vote on the action. The action shall be evidenced by one (1) or more written consents describing the action approved, signed either manually or in facsimile, by the requisite number of members entitled to vote on the action, and delivered to the corporation for inclusion in the minutes or filing with the corporate records.

(b) If not otherwise determined under W.S. 17-19-703 or 17-19-707, the record date for determining members entitled to take action without a meeting is the date the first member signs the consent under subsection (a) of this section.

(c) A consent signed under this section has the effect of a meeting vote and may be described as such in any document filed with the secretary of state.