Wyo. Stat. Ann. § 11-35-107

No marketing order or amendment directly affecting producers is effective until the board determines the issuance of the order is approved and favored by at least two-thirds (2/3) of the producers eligible to participate in a referendum on the question of its approval, and who during the representative period, have produced for market the commodities specified in the order or amendment in commercial quantities within the production area specified in the marketing order, and who during the respective period have produced at least fifty-one percent (51%) of the volume of the commodity produced for sale.