17-4752 Investments in bonds issued pursuant to act  conditions All banks  trust companies  bankers  savings banks and institutions  building and loan associations  savings and loan associations  investment companies and other persons carrying on a banking or investment business  all insurance companies  insurance associations  and other persons carrying on an insurance business  and all executors  administrators  curators  trustees  and other fiduciaries  may legally invest any sinking funds  moneys or other funds belonging to them or within their control in any bonds or other obligations issued by a municipality pursuant to this act or by any urban renewal agency vested with urban renewal project powers under K