760 ILCS 3/901

(a) Except as otherwise provided in subsection (b), a trustee administering a trust has a duty to invest and manage the trust assets to comply with the prudent investor rule set forth in this Article. (b) The prudent investor rule, a default rule, may be expanded, restricted, eliminated, or otherwise altered by express terms of the trust. A trustee is not liable to a beneficiary for the trustee's reasonable and good faith reliance on those express provisions.