The trustees of trust funds may manage and invest such funds in accordance with the prudent investor rule under RSA 564-B:9-901-RSA 564-B:9-906 without regard to the investment limitations of RSA 31:25 and RSA 31:25-a, provided, however, the trustees of trust funds:
I. Notify the attorney general in writing of their decision to invest according to the prudent investor rule; and
II. Hire or employ the trust department of a bank or a brokerage firm to provide investment advice and assistance under RSA 31:38-a, III.