Colo. Rev. Stat. § 31-25-1211
No district created under the provisions of this part 12 shall issue bonds, levy taxes, fees, or assessments or provide improvements or services unless the municipality has approved an operating plan and budget for the district. The operating plan or budget shall specifically identify the services or improvements to be provided by the district, the taxes, fees, or assessments to be imposed by the district, the estimated principal amount of bonds to be issued by the district, and such additional information as the municipality may require. The district shall file an operating plan and its proposed budget for the next fiscal year with the clerk of the municipality no later than September 30 of each year. All of the business records of the district shall be considered public records, as defined in section 24-72-202(6), C.R.S., and shall promptly be made available to the municipality upon request. For the purposes of this section, the business records of the district shall not include the business records of the owners of property in the district. The municipality may require the district to supplement the district's operating plan or budget where necessary. The municipality shall approve or disapprove the operating plan and budget within thirty days after receipt of such operating plan and budget and all requested documentation relating thereto, but not later than December 5 of the year in which such documents are filed. Thereafter, the services, improvements, and financial arrangements of the district shall conform so far as practicable to the operating plan and the budget. The operating plan and the budget may, from time to time, be amended by the district with the approval of the municipality in substantially the same manner as the process for formulating the operating plan and budget for each year. Any material departure from the operating plan and the budget, as originally approved or amended from time to time, may be enjoined by an order of the municipality filed with the board.
C.R.S. § 31-25-1211