Wyo. Stat. § 41-9-601: Petition of landowners.

When the commissioners of a drainage district by unanimous vote of the total membership thereof shall determine to call an election or whenever a majority of the landowners in any drainage district in this state, who shall represent one-half of the ownership of the lands theretofore assessed for benefits and construction within said drainage district, shall file with the commissioners of such district a petition praying for the dissolution thereof, it shall be the duty of the commissioners of such district to forthwith call an election of all of the landowners of said district to determine whether or not such district shall be dissolved.