RSA 564-B:8-802 Duty of Loyalty.

(a) A trustee shall administer, invest and manage the trust and distribute the trust property solely in the interests of the beneficiaries.
(b) Subject to the rights of persons dealing with or assisting the trustee as provided in RSA 564-B:10-1012, a sale, encumbrance, or other transaction involving the investment or management of trust property entered into by the trustee for the trustee's own personal account or which is otherwise affected by a conflict between the trustee's fiduciary and personal interests is voidable by a beneficiary affected by the transaction unless:
(1) the transaction was authorized by the terms of the trust;
(2) the transaction was approved by the court;
(3) the beneficiary did not commence a judicial proceeding within the time allow