Colo. Rev. Stat. § 25-7-509
Inasmuch as uniformity in the regulation of asbestos abatement practices and uniformity in the qualifications and certification of persons performing asbestos abatement is a matter of statewide concern, no certification or licensing of asbestos abatement projects nor any examination or certification of persons certified under this part 5 shall be required by any city, town, county, or city and county; however, any such local governmental authority may impose reasonable registration requirements on any person performing asbestos abatement as a condition of performing such activity within the jurisdiction of such authority. Registration fees charged by any such local governmental authority to any such person shall not exceed those costs associated with such registration requirements and functions.
C.R.S. § 25-7-509