Bonds of an authority shall be authorized by resolution of its board 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 annual rate or rates, not exceeding nine percent, 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 to 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. The bonds may be sold at public or private sale. 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 such commissioners or officers had remained in office until such delivery. Any provisions of any law to the contrary notwithstanding, any bonds issued pursuant to this chapter shall be fully negotiable within the meaning and for all the purposes of Title 8.3A. 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 specific project or facility of such authority shall be conclusively deemed to have been issued for such enumerated purpose and such project or facility shall be conclusively deemed to have been conducted and operated in all respects in accordance with the purposes and provisions of this chapter.