Colo. Rev. Stat. § 25-7-205
The division or the commission may grant a waiver from the best available control technology requirements of this part 2 for proposed new or modified sources in order to encourage the use of an innovative technological system or systems of continuous emission reduction if the administrator of the United States environmental protection agency has delegated such authority and if the division or the commission determines, after notice and opportunity for public hearing, and after securing the consent of the governor of an affected state, to the extent that such consent may be lawfully required by the federal act, that such innovative technological system or systems of continuous emission reduction have a substantial likelihood of achieving greater continuous emission reduction than the means of emission limitation which, but for such waiver, would be required, or of achieving continuous emission reduction equivalent to that which, but for such waiver, would be required, at a lower cost in terms of energy or economic or nonair quality environmental impact. If a public hearing is requested by an interested person, the request shall, within twenty days after its receipt, be transmitted to the commission. The commission shall, within sixty days after its receipt of the request, hold a public hearing with respect thereto and shall, within thirty days after such hearing, issue its decision.
C.R.S. § 25-7-205