Colo. Rev. Stat. § 37-47-132
In order to enable a subdistrict organized under the provisions of this article to furnish water to lands which have not been irrigated and had, up to the time of the construction of the works to be constructed by said subdistrict, no water supply and, at the same time, to enable other areas within the same subdistrict to obtain a supplemental supply of water or to enable said subdistrict to furnish a complete service to certain lands, certain areas, certain persons or municipalities within the district and to supplement an existing supply or service to other persons, localities, and municipalities, prior to the time that an appraisement of benefits is made in any such subdistrict, the board of directors may make a resolution setting forth the amount of water or the kind of service to be allocated to specified classes or areas, and such limitation shall be taken into consideration by the appraisers in the appraisal of benefits with respect to lands affected by any such limitation. Like conditions and restrictions may be provided for payment by certain lands or persons of revenue warrants which pledge the income from the works of said subdistricts, but no such limitation shall be contained or govern the payment of any general obligations of any such subdistrict.
C.R.S. § 37-47-132