Wyo. Stat. § 41-9-242
Assessments to meet expenses of any current year of any district shall become due, payable and delinquent at such time or times each year as may be fixed by law for state and county taxes to become due, payable and delinquent. Commissioners having charge of any drain shall on or before the first Tuesday of June of each year file with the clerk of the court having jurisdiction of such district, a report showing an itemized estimate of the money to be raised by assessment within the district for the purpose of constructing new work, maintenance and to meet the yearly current expenses of the district. In addition to the amount above provided, the commissioners may add a sum which in their judgment shall be sufficient to provide for possible delinquencies. Within thirty (30) days after filing such annual report, at a time and place to be fixed by the court or a judge thereof, the judge shall examine such report, hear all objections thereto, fix and determine the amount to be raised by assessments for the current year and cause such adjudication to be entered of record in said court and a certified copy thereof to be delivered to the commissioners of such district. The commissioners shall add thereto such amount as may be necessary to meet the principal and interest on lawful indebtedness of the district maturing during the current year, together with a sum which in their judgment shall be sufficient to provide for possible delinquencies. When thus completed it shall be known as "The budget of .... Drainage District for the year (year)" and also be verified under oath by any one (1) of the commissioners.
W.S. 41-9-242