1. Revenue bonds issued pursuant to the provisions of sections 108.450 to 108.470 shall be of such denomination, shall bear such rate or rates of interest not to exceed fourteen percent per annum, and shall mature at such time or times, not exceeding thirty-five years from their date of issue, as determined by the county commission, or the legislative body of the county, in its order, resolution or ordinance directing the issuance of the bonds. The bonds may be either serial bonds or term bonds and may be issued with or without reservation of the right to call them for payment or redemption in advance of their maturity, upon the giving of notice, and with or without a covenant requiring the payment of a premium in the event of a call for redemption prior to maturity. The bonds may be sold at such price or prices as the issuing county shall determine, but at not less than ninety-four percent of the principal amount thereof. Such bonds shall be sold at public sale or at private sale if the applicable county commission or applicable legislative body of the county determines it is in the best interest of the issuing county or counties to sell such bonds at private sale. The reason or reasons that private sale is in the best interest of the issuing county or counties shall be set forth in the ordinance, order or resolution authorizing the private sale. The decision of the applicable county commission or applicable county legislative body shall be conclusive.

2. The bonds when issued and sold shall be negotiable instruments within the meaning of chapter 400 and the interest thereon shall be exempt from any state or local income taxes under the laws of the state of Missouri. The provisions of section 409.402 to the contrary notwithstanding, the bonds issued pursuant to the provisions of sections 108.450 to 108.470 shall be subject to the provisions of sections 409.101 to 409.418, the Missouri uniform securities act.