Colo. Rev. Stat. § 37-45-126
The board, in making the annual assessments and levies, shall take into account the maturing indebtedness for the ensuing year as provided in its contracts or the maturing of bonds and interest on all bonds and deficiencies and defaults of prior years and shall make ample provision for the payment thereof. In case the proceeds of such levies and assessments made under the provisions of this article, together with other revenues of the district, are not sufficient to punctually pay the annual installments on its contracts or bonds and interest thereon and to pay defaults and deficiencies, then the board shall make such additional levies of taxes or assessments as may be necessary for such purposes; and, notwithstanding any limitations by contract, order, tax lien, or otherwise, such taxes and assessments shall be made and shall continue until the indebtedness of the district is fully paid; except that the additional levies authorized by this section may not be made to cover defaults and deficiencies with respect to evidences of indebtedness authorized and issued by a district pursuant to any law if such evidences of indebtedness declare on their faces that they are payable solely from revenues derived from payments made with respect to contracts which are entered into pursuant to this article and further except that the amount of such additional levies of taxes under class A shall not in any one year exceed an amount that would be raised by a levy of one-half mill against the valuation for assessment of such property as fixed for general tax purposes and further except that such levies for defaults and deficiencies shall not, at any time, be made to impose upon class A payments in excess of twenty-five percent of the anticipated revenue from all sources to be raised for the specific purpose of payment of existing defaults and deficiencies and further except that, in making such additional levies or assessments, the board shall take into account all sources of revenue and equitably distribute the burden of such defaults and deficiencies according to the uses and benefits as provided in this article.
C.R.S. § 37-45-126