C.R.S. § 39-7-104: Failure to file statement.

If any person owning or operating any oil and gas leaseholds or lands producing or capable of producing oil or gas on the assessment date fails or refuses to prepare and file the statement required by the provisions of section 39-7-101, then the assessor shall list such property and value the same for assessment on the basis of the best information available to and obtainable by him.