Colorado Revised Statutes Title 39. Taxation § 39-5-103.5. Maps of parcels of land in the county

(1) Prior to January 1, 1981, each assessor shall prepare and maintain full, accurate, and complete maps showing the parcels of land in his county. The maps shall include a master county index map, together with applicable township, section, and quarter-section maps, depending on density. Guidelines shall be established by the administrator to produce uniformity throughout the state. The guidelines shall include the definition of a parcel, the development of a parcel numbering system, map size, map scale, and suggestions for minimum information to be plotted.

(2) In fulfilling the duty imposed upon him by subsection (1) of this section, the assessor may employ other mapping resources or maps available to him.