Iowa Code § 12.76: Limitations.

Bonds or notes issued pursuant to section 12.71, Code 2020, are not debts of the state, nor of any political subdivision of the state, and do not constitute a pledge of the faith and credit of the state or a charge against the general credit or general fund of the state. The issuance of any bonds or notes pursuant to section 12.71, Code 2020, by the treasurer of state does not directly, indirectly, or contingently obligate the state or a political subdivision of the state to apply moneys from, or to levy or pledge any form of taxation whatever to, the payment of the bonds or notes. Bonds and notes issued under section 12.71, Code 2020, are payable solely and only from the sources and special fund provided in section 12.72.