Colo. Rev. Stat. § 23-71-706
The securities shall be payable and collectible, as to principal, interest, and any prior redemption premium, solely out of net pledged revenues; the holder thereof may not look to any general or other fund for such payment of such securities, except the net revenues pledged therefor; the securities shall not constitute an indebtedness or a debt within the meaning of any constitutional or statutory provision or limitation, if any such provision or limitation appertains thereto; the securities shall not be considered or held to be general obligations of the district but shall constitute its special obligations; and the full faith and credit of the district shall not be pledged for their payment. Such payment shall not be secured by an encumbrance, mortgage, or other pledge of property of the district, except for its pledged revenues. No property of the district, subject to said exception, shall be liable to be forfeited or taken in payment of securities.
C.R.S. § 23-71-706