C.R.S. § 32-11-546

(1) Before selling any district securities publicly, the board shall: (a) Cause a notice calling for bids for the purchase of the securities to be published once a week for four consecutive weeks by four weekly insertions a week apart, the first publication to be not more than thirty days nor less than twenty-two days next preceding the date of sale, in a newspaper published within the boundaries of the district and having general circulation therein; (b) Cause such other notice to be given as the board may direct.