Colo. Rev. Stat. § 23-3.1-214
The income or other revenues of the authority, including income earned on the investment of moneys in the prepaid expense and the savings trust funds, all properties at any time owned by the authority, any bonds, notes, or other obligations issued pursuant to this part 2, the transfer of and the income, including any profit made on sale, from any such bonds, notes, or other obligations, and all trust indentures and other documents issued in connection with such bonds, notes, or other obligations shall be exempt at all times from all taxation and assessments in the state of Colorado. In the bond resolution authorizing the issuance of any bonds by the authority, the board may waive the exemption from federal income taxation for interest on such bonds. Bonds issued by the authority shall also be exempt from the provisions of article 51 of title 11, C.R.S.
C.R.S. § 23-3.1-214