Colo. Rev. Stat. § 30-28-109
The county planning commission shall certify a copy of its master plan, or any adopted part or amendment thereof or addition thereto, to the board of county commissioners of the county. The regional planning commission shall certify such copies to the boards of county commissioners of the counties lying wholly or partly within the region. The county or regional planning commission shall certify such copies to the planning commission of all municipalities within the county or region. Any municipal planning commission which receives any such certification may adopt so much of the plan, part, amendment, or addition as falls within the territory of the municipality as a part or amendment of or addition to the master plan of the municipality, and, when so adopted, it shall have the same force and effect as though made and prepared, as well as adopted, by such municipal planning commission.
C.R.S. § 30-28-109