Modification or termination of trust; proceedings for approval or disapproval
(a) In addition to the methods of termination prescribed by sections 411 to 414, inclusive, a trust shall terminate if it is revoked or expires under its terms, no purpose of the trust remains to be achieved or the purposes of the trust have become unlawful, contrary to public policy or impossible to achieve.
(b) A proceeding to approve or disapprove a proposed modification or termination under sections 411 to 416, inclusive, or a trust combination or division under section 417, may be commenced by a trustee or beneficiary and a proceeding to approve or disapprove a proposed modification or termination under section 411 may be commenced by the settlor.