N.D. Cent. Code § 40-35-09
Revenue bonds shall be sold at not less than ninety-eight percent of par. The bonds may be sold at private sale without notice or at public sale after notice of the sale has been published once at least five days prior to the sale in a newspaper circulating in the municipality. Bonds sold at private sale shall bear interest at a rate or rates and be sold at a price resulting in an average net interest cost not exceeding twelve percent per annum. There is no interest rate ceiling on issues sold at public sale or to the state of North Dakota or any of its agencies or instrumentalities. As to any series or issue of bonds for which a notice of sale was published but for which no bids were received or all bids received were rejected, the governing body may, without readvertising the bonds for sale, negotiate the sale of all of the bonds to any person upon terms complying with those specified in the notice of sale theretofore published and, if bids were rejected, more favorable to the municipality than those specified in the rejected bid.
N.D.C.C. § 40-35-09