Colo. Rev. Stat. § 30-25-113
The clerk of the board, upon such appeal being taken, shall immediately give notice thereof to the chairman of the board of county commissioners, and shall make out a brief return of the proceedings in the case before the board with its decision thereon, and shall file the same, together with the bond and all papers in the case in his possession, with the clerk of the district court. The appeal shall be docketed and tried in a summary manner, and costs shall be awarded as in appeals from county courts to district courts. If the amount involved exceeds the sum of three hundred dollars, the applicant, within ten days after taking such appeal, shall file a complaint as in other cases in the district court, a copy of which shall also be served upon the clerk of the board, and answer shall be made thereto as in other cases. If the county clerk and recorder is an interested party in such claim, the giving of notice shall be made on the chairman of the board of county commissioners, and the bond provided for in section 30-25-112 shall be approved by the chairman of the board of county commissioners.
C.R.S. § 30-25-113