The secretary of the district on or before the first day of November in each year shall estimate the amount of money necessary to be raised for any and all district purposes during the ensuing year based upon a budget furnished him or her by the district board and submit the same to the county legislative authority of the county within which the major portion of the district is situated for its suggestions, approval, and revision and upon the approval of the budget by said county legislative authority, either as originally submitted or as revised, the secretary shall prepare an assessment roll with appropriate headings in which must be listed all the lands in each assessment classification shown on the base assessment map.