N.D. Cent. Code § 61-35-34
Revenue bonds or refunding bonds must 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 before the sale in a newspaper circulating in the district. Bonds sold at private sale must bear interest at a rate 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 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 board, without readvertising the bonds for sale, may negotiate the sale of all of the bonds to any person upon terms complying with those specified in the published notice of sale and, if bids were rejected, more favorable to the district than those specified in the rejected bid.
N.D.C.C. § 61-35-34