Colorado Revised Statutes Title 39. Taxation § 39-13-101. Legislative declaration

(1) The general assembly declares that, in enacting laws relating to the general property tax, it has provided that certain property in each county of the state shall be appraised and the actual value thereof determined by the assessor and that one of the several factors to be considered by him in determining the actual value of any property shall be “comparison with other properties of known or recognized value”.

(2) It further declares that such comparison may be best effected if there is available to the assessor a continuing record of the consideration paid or to be paid by purchasers of real property evidenced, prior to recording, on the document conveying title to such property and recorded in the office of the county clerk and recorder in the several counties of the state in the manner provided by law and that this article is enacted to provide a means of developing such continuing record and making such record available for use primarily by assessors.