1. Bonds of an authority shall be authorized by its resolution and may be issued in one or more series and shall bear such date or dates, mature at such time or times, bear interest at such rate or rates, be in such denomination or denominations, be in such form, either coupon or registered, carry such conversion or registration privileges, have such rank or priority, be executed in such manner, be payable in such medium of payment, at such place or places, and be subject to such terms of redemption (with or without premium) as such resolution, its trust indenture or mortgage may provide.

2. The bonds shall be sold at not less than par at public sale held after notice published once at least five days prior to such sale in a newspaper having a general circulation in the area of operation and in a financial newspaper published in Kansas City or in the city of St. Louis; provided, that such bonds may be sold to the federal government at private sale at not less than par and, in the event less than all of the bonds authorized in connection with any project or projects are sold to the federal government, the balance of such bonds may be sold at private sale at not less than par at an interest cost to the authority of not to exceed the interest cost to the authority of the portion of the bonds sold to the federal government.

3. In case any of the commissioners or officers of the authority whose signatures appear on any bonds or coupons shall cease to be such commissioners or officers before the delivery of such bonds, such signatures shall, nevertheless, be valid and sufficient for all purposes, the same as if they had remained in office until such delivery. Any provision of any law to the contrary notwithstanding, any bonds issued pursuant to sections 99.010 to 99.230 shall be fully negotiable.

4. In any suit, action or proceedings involving the validity or enforceability of any bond of an authority or the security therefor, any such bond reciting in substance that it has been issued by the authority to aid in financing a housing project to provide dwelling accommodations for persons of low income shall be conclusively deemed to have been issued for a housing project of such character and said project shall be conclusively deemed to have been planned, located and constructed in accordance with the purposes and provisions of sections 99.010 to 99.230.