Idaho Code § 70-1806

Such bonds shall be signed on behalf of the port district by the president of the port commission and shall be attested by the secretary of the port commission, one (1) of which signatures may be a facsimile signature, and shall have the seal or facsimile seal of the port district impressed thereon. All interest coupons attached thereto shall be signed with the facsimile signatures of said officials. Such bonds shall be sold in the manner and at such price as the port district shall deem advisable, either at public or private sale.