C.R.S. § 31-10-908

(1) If the governing body of a municipality determines that an election is to be conducted by mail ballot, the clerk shall supervise the distributing, handling, counting of ballots, and the survey of returns and shall take all necessary steps to protect the confidentiality of the ballots cast and the integrity of the election. (2) Official ballots must be prepared and all other preelection procedures followed as otherwise provided by this article; except that mail ballot packets must be prepared in accordance with this part 9.