Colo. Rev. Stat. § 29-4-603
When, pursuant to the provisions of this part 6, an election is required in order to authorize an authority or housing authority to construct or acquire a project or housing project, the cooperation agreement between such authority or housing authority and the governing body of the city, city and county, or county from which such cooperation agreement must be obtained shall make provision for the payment of the costs of such election and all cities as defined in article 55 of title 24, C.R.S., and parts 1 and 2 of this article, and cities and counties and counties as defined in part 5 of this article shall have the power to assume and pay for the costs of such election or to lend or donate sufficient money to an authority or housing authority for such purpose.
C.R.S. § 29-4-603