2 Colo. Code Regs. § 601-10-6.02
Bid Proposals shall be prepared by the CDOT Engineering Estimates and Market Analysis Unit and shall contain the components listed in Section 5.03 , and (f) except that indirect administrative costs as defined in Section 5.03 Shall not include those costs that are necessary to administer a Contractor's Work but not Work performed by CDOT: such as: the cost of processing a Contractor's monthly estimates, the cost of processing a Contractor's retainage. The Bid Proposal shall be prepared in accordance with Section 4.05 of the rules and will be approved by CDOT Chief Engineer. However, a Bid bond will not be required and CDOT will be considered as a prequalified Contractor. The Bid Proposal shall be based upon the assurance that Work performed by CDOT will be subject to the same standards that govern the Contractor's Work.
2 CCR 601-10-6.02