In all districts in which an assessment is levied for the purpose of maintaining and operating the works of said district, at a regular meeting of the board between August 1 and November 8 of each year, the board of directors shall levy an assessment upon all the lands of the district for the expense of maintaining and operating the property of the district; provided, that in all districts where the collection of assessments is made by county officers as provided by sections 43-727, 43-729, Idaho Code, said levy shall be made on or before the third Tuesday of July of each year.
Idaho Code § 43-701