N.Y. Estates, Powers & Trusts Law § 10-6.6
or less extensive than authorized; trustee's authority to invade principal in trust.
(a) An exercise of a power of appointment is not void because its exercise is:
(b) An authorized trustee with unlimited discretion to invade trust principal may appoint part or all of such principal to a trustee of an appointed trust for, and only for the benefit of, one, more than one or all of the current beneficiaries of the invaded trust (to the exclusion of any one or more of such current beneficiaries). The successor and remainder beneficiaries of such appointed trust may be one, more than one or all of the successor and remainder beneficiaries of such invaded trust (to the exclusion of any one, more than one or all of such successor and remainder beneficiaries).
(c) An authorized trustee with the power to invade trust principal but without unlimited discretion may appoint part or all of the principal of the trust to a trustee of an appointed trust, provided that the current beneficiaries of the appointed trust shall be the same as the current beneficiaries of the invaded trust and the successor and remainder beneficiaries of the appointed trust shall be the same as the successor and remainder beneficiaries of the invaded trust.
(i) Unless the authorized trustee provides otherwise:
(j) The exercise of the power to appoint to an appointed trust under paragraph (b) or (c) of this section shall be evidenced by an instrument in writing, signed, dated and acknowledged by the authorized trustee. The exercise of the power shall be effective thirty days after the date of service of the instrument as specified in subparagraph (2) of this paragraph, unless the persons entitled to notice consent in writing to a sooner effective date. The exercise of the power is irrevocable on such effective date, either thirty days following service of the notice or the effective date as set forth in the written consent.
(k) This section shall not be construed to abridge the right of any trustee to appoint property in further trust that arises under the terms of the governing instrument of a trust or under any other provision of law or under common law, or as directed by any court having jurisdiction over the trust.
(n) An authorized trustee may not exercise a power authorized by paragraph (b) or (c) of this section to effect any of the following:
(r) Unless the invaded trust expressly provides otherwise, this section applies to:
(s) For purposes of this section: