Tenn. Code Ann. § 35-4-102: Bank or trust company establishing common trust funds - Investing in trust funds

Any bank or trust company qualified to act as fiduciary in this state may establish common trust funds for the purpose of furnishing investments to itself as fiduciary, or to itself and others as cofiduciaries, or to another bank or trust company which may, as such fiduciary or cofiduciary, invest funds that it lawfully holds for investment in interests in the common trust funds, if this investment is not prohibited by the instrument, judgment, decree or order creating the fiduciary relationship, and if, in the case of cofiduciaries, the bank or trust company procures the consent of its cofiduciaries to the investment.