Colo. Rev. Stat. § 32-7-120
To carry out the purposes of this article, the board is authorized to issue negotiable coupon bonds payable solely from the revenues derived, or to be derived, from the facility or combined facilities of the service authority. The terms, conditions, and details of said bonds, the procedures related thereto, and the refunding thereof shall be substantially the same as those provided in part 4 of article 35 of title 31, C.R.S., relating to water and sewer revenue bonds; except that the purposes for which the same may be issued shall not be so limited. Revenue bonds issued under this article shall not constitute an indebtedness within the meaning of any constitutional or statutory limitation or other provision. Each bond issued under this section shall recite in substance that said bond, including the interest thereon, is payable solely from the revenues pledged for the payment thereof and that said bond does not constitute a debt of the service authority within the meaning of any constitutional or statutory limitations or provisions. Such revenue bonds may be issued to mature at such time, not exceeding the estimated life of the facility to be acquired with the bond proceeds, as determined by the board, but in no event beyond thirty years from their respective dates.
C.R.S. § 32-7-120