72-38-903. Diversification -- duty of trustee -- exception. (1) Subject to subsection (2), in making and implementing investment decisions, the trustee has a duty to diversify the investments of the trust unless, under the circumstances, it is not prudent to do so.

(2) If trust assets include farm or ranch property, a closely held family business, timber interests, or interests in oil, gas, or minerals, the trustee may elect to retain those assets. A trustee's exercise of discretion to retain assets of the character described in this subsection is not a breach of the trustee's duty to diversify investments.