Section 251.630 - Issuance of bonds, purpose - refunding - interest exempt from state taxation1. A regional economic development district may at any time authorize or issue revenue bonds for the purpose of paying all or any part of the cost of any regional economic development project. Every issue of such bonds shall be payable out of the revenues of the regional economic development district and may be further secured by other property of the regional economic development district which may be pledged, assigned, mortgaged, or a security interest granted for such payment, without preference or priority of the first bonds issued, subject to any agreement with the holders of any other bonds pledging any specified property or revenues. Such bonds shall be authorized by resolution of the regional economic development district, and if issued by the regional economic development district, shall bear such date or dates and shall mature at such time or times, but not in excess of twenty-five years, as the resolution shall specify. Such bonds shall be in such denomination, bear interest at such rate or rates, be in such form, either coupon or registered, be issued as current interest bonds, compound interest bonds, variable rate bonds, convertible bonds, or zero coupon bonds, be issued in such manner, be payable in such place or places, and subject to redemption as such resolution may provide notwithstanding the provisions of section 108.170. The bonds may be sold at either public or private sale at such interest rates, and at such price or prices as the regional economic development district board shall determine.2. Any issue of regional economic development district bonds outstanding may be refunded at any time by the regional economic development district by issuing its refunding bonds in such amount as the regional economic development district may deem necessary. Such bonds may not exceed the amount sufficient to refund the principal of the bonds to be refunded together with any unpaid interest thereon and any premiums, commissions, service fees, and other expenses necessary to be paid in connection with the refunding. Any such refunding may be effected whether the bonds to be refunded then shall have matured or thereafter shall mature, either by sale of the refunding bonds and the application of the proceeds thereof to the payment of the bonds being refunded or by the exchange of the refunding bonds for the bonds being refunded with the consent of the holder or holders of the bonds being refunded. Refunding bonds may be issued regardless of whether the bonds being refunded were issued in connection with the same project or a separate project and regardless of whether the bonds proposed to be refunded shall be payable on the same date or different dates or shall be due serially or otherwise.3. Bonds issued under this section shall exclusively be the responsibility of the regional economic development district payable solely out of regional economic development district funds and property as provided in the regional economic development district law and shall not constitute a debt or liability of the state of Missouri or any agency or political subdivision of the state. The regional economic development district shall not be obligated to pay such bonds with any funds other than those specifically pledged to repayment of the bonds. Any bonds issued by a regional economic development district shall state on their face that they are not obligations of the state of Missouri or any agency or political subdivision thereof other than the regional economic development district.4. Bonds issued under this section, the interest thereon, or any proceeds from such bonds shall be exempt from taxation in the state of Missouri.