(1) A person may commence a judicial proceeding to contest the validity of a trust that was revocable at the settlor's death within the earlier of: three (3) years after the settlor's death; or
(2) ninety (90) days after the trustee sent the person a notice informing the person of the trust's existence, the settlor's name, the trustee's name and address, the time allowed for commencing a proceeding, and a description of the beneficiary's interest, if any.
(3) Upon the death of the settlor of a trust that was revocable at the settlor's death, the trustee may proceed to distribute the trust property in accordance with the terms of the trust. The trustee is not subject to liability for the distribution unless: the trustee knows of a pending judicial proceeding contesting the validity of the trust; or
(4) a potential contestant has notified the trustee of a possible judicial proceeding to contest the trust and a judicial proceeding is commenced within sixty (60) days after the contestant sent the notification.
(5) A beneficiary of a trust that is determined to have been invalid is liable to return any distribution received.