Colo. Rev. Stat. § 29-4-607
At the hour designated for closing in the election resolution, the ballot boxes or voting machines in the several polling places shall be closed, the ballots counted, and the returns thereof made to the council, board of commissioners, or other governing body calling the election. At or before the next regular meeting of the council, board of commissioners, or other governing body calling the election, next succeeding the date of such election, such council, board of commissioners, or governing body shall canvass the returns and determine and declare the results of the election, and if a majority of the votes cast at such election have been cast in favor of an act which has been so proposed, the city, city and county, authority, housing authority, or county housing authority shall be deemed to have proper authority to proceed with the same in accordance with the authority so granted, but not otherwise.
C.R.S. § 29-4-607