Section 70 ILCS 15/21 - Bonds; legal investment status(a) Counties, cities, villages, incorporated towns, and other municipal corporations, political subdivisions and public bodies, and public officers of any thereof, all banks, bankers, trust companies, savings banks and institutions, building and loan associations, savings and loan associations, investment companies, insurance companies and associations, and all executors, administrators, guardians, trustees and other fiduciaries may legally invest any sinking funds, moneys, or other funds belonging to them or within their control, in any bonds issued by the Kankakee River Valley Area Airport Authority pursuant to this Act.(b) Counties, cities, villages, incorporated towns, and other municipal corporations, political subdivisions and public bodies, and public officers of any thereof, all banks, bankers, trust companies, savings banks and institutions, building and loan associations, savings and loan associations, investment companies, insurance companies and associations, and all executors, administrators, guardians, trustees and other fiduciaries may legally invest any sinking funds, moneys, or other funds belonging to them or within their control in any bonds issued by the Kankakee River Valley Area Airport Authority pursuant to any agreement or compact entered into by the Authority pursuant to this Act.