Colo. Rev. Stat. § 23-71-406
If a board of trustees has elected to withdraw all district moneys from the temporary custody of the county treasurer and there are no moneys or insufficient moneys to the credit of the proper fund of said district on deposit with a depository to pay any warrant or order drawn against said fund, the treasurer of said board of trustees shall register said warrant in the same manner as otherwise prescribed for a county treasurer under the provisions of section 23-71-404. Registered warrants shall draw interest from the date of such registration and endorsement at the rate and in the same manner as warrants registered by the county treasurer. The treasurer of said board of trustees shall perform all duties required of the county treasurer under section 23-71-404(3) in the registration and payment of district warrants registered by said treasurer of the board of trustees, including publication for notice of payment thereof.
C.R.S. § 23-71-406