Iowa Code § 633.127
Any bank or trust company qualified to act as fiduciary in this state may establish common trust funds, or may utilize one or more common trust funds previously established by it, for the purpose of furnishing investments to itself as fiduciary, or to itself and others, as cofiduciaries, or to another bank or trust company as fiduciary or cofiduciary; and may, as a fiduciary or cofiduciary, invest funds which it lawfully holds for investment in interests in common trust funds maintained by it or by another bank or trust company at least eighty percent of the voting stock of which is owned or controlled by a bank holding company which owns or controls at least eighty percent of the common stock of the bank or trust company investing such funds, if such investment is not prohibited by the instrument, judgment, decree, or order creating such fiduciary relationship, and if, in the case of cofiduciaries, the bank or trust company procures the consent of its cofiduciaries to such investment. If the instrument creating the fiduciary relationship gives to the bank or trust company the exclusive right to select investments, the consent of the cofiduciary shall not be required.
Iowa Code § 633.127
Referred to in §633.126, 633.129