C.R.S. § 30-11-105.1

In addition to any other powers prescribed in this part 1, any county or county officer shall have standing in district court to defend any action brought against such county or officer by contesting the constitutionality of a statute underlying such action and affecting the rights, status, or other legal relations of such county or county officer or directing the performance of, defining, or prescribing the duties or responsibilities of such county officer.