Colo. Rev. Stat. § 29-4-123
The powers conferred by this part 1 shall be in addition and supplemental to the powers conferred by any other law and not in substitution for the powers conferred by any other law. Bonds may be issued under this part 1 for any housing project notwithstanding that any other law may provide for the issuance of bonds by the city or an authority for like purposes and without regard to the requirements, restrictions, or procedural provisions contained in any other law. Bonds may be issued under this part 1 notwithstanding any debt or other limitation prescribed by any other law. Any proceedings taken prior to April 19, 1935, by any municipality relating to the subject matters of this part 1, whether or not commenced under any other law, may be continued under this part 1, or, at the option of the council, may be discontinued and new proceedings instituted under this part 1.
C.R.S. § 29-4-123