Colo. Rev. Stat. § 24-105-101
The executive director may promulgate rules providing for as many alternative methods of construction contracting management as he or she may determine to be feasible. These rules may set forth criteria to be used in determining which method of construction contracting management is to be used for a particular project, grant to the head of a division within the department or the procurement official who is responsible for carrying out the construction project the discretion to select the appropriate method of construction contracting management for a particular project, and require the procurement agent to execute and include in the contract file a written statement setting forth the facts which led to the selection of a particular method of construction contracting management for each project.
C.R.S. § 24-105-101