The board of directors shall modify such classification so that the same conforms to the changes made therein in the hearings before said board, and the secretary of the district shall certify and file said classification of property of the district so modified, properly tabulated or shown by a map or both, with the county clerk and recorder of each county into which said district extends. If on appeal said classification is modified, the board shall then modify the classification, and the secretary of the district shall certify and file the same with the clerk of each county in which the district is located.L. 23: p. 505, § 16. CSA: C. 138, § 32. CRS 53: § 149-5-16. C.R.S. 1963: § 150-4-16.