6 Colo. Code Regs. § 1007-3-101.4
Unless provided otherwise in the Compliance Order or Administrative Penalty Assessment, all Compliance Orders and Administrative Penalty Assessments are effective upon receipt. All appeals of Compliance Orders or Administrative Penalty Assessments shall be taken in accordance with § 25-15-308(3), C.R.S., and shall be filed with the Division of Administrative Hearings no later than thirty calendar days after the effective date of the Compliance Order or the Administrative Penalty Assessment.
All emergency orders are effective upon receipt. Any person subject to an Emergency Order is entitled to an immediate hearing in accordance with § 24-4-105(12), C.R.S., and all requests for hearings on an Emergency Order shall be filed with the Division of Administrative Hearings no later than thirty calendar days after the effective date of the Emergency Order.
All appeals of determinations by the Division of Administrative Hearings regarding Compliance Orders and Emergency Orders shall be taken in accordance with § 25-15-308(3)(h), C.R.S., and shall be filed with the Denver District Court no later than thirty calendar days after the effective date of the determination. All appeals of determinations by the Division of Administrative Hearings regarding Administrative Penalty Assessments shall be taken in accordance with § 25-15-308(3)(i), C.R.S., and shall be filed with the Administrator of the Solid and Hazardous Waste Commission no later than thirty calendar days after the effective date of the determination.
6 CCR 1007-3-101.4