Section 32-11-646 - Division of tract(1) If any tract is divided after an assessment thereon has been levied and divided into installments and before the collection of all the installments, the board may require the county assessor to apportion the uncollected amounts upon the several parts of land so divided according to the proportions thereof based upon their valuation for assessment for taxes.(2) The report of such apportionment, when approved, shall be conclusive on all the parties, and all assessments thereafter made upon such tracts shall be according to such subdivision.L. 69: p. 803, § 159. C.R.S. 1963: § 89-21-159.