Colorado Revised Statutes Title 30. Government County § 30-6-108. County clerk and recorders to record

It is the duty of the county clerk and recorders of the said counties to record at length said proclamation of the secretary of state, together with said survey and plat, in the deed records of his county, and thereafter the county line so established shall be the lawfully constituted line between said counties, and the said territory so annexed to such county shall be subject to the jurisdiction of the county to which it has been so added, and shall be a part and parcel thereof.