N.Y. Est. Powers & Trusts Law § 11-a-6.4

§ 11-A-6.4 Application of article\n Except as specifically provided in the trust instrument, the will, or\nin this article, this article shall apply to any receipt or expense\nreceived or incurred on or after its effective date by any trust or\ndecedent's estate established before, on or after its effective date and\nwhether the asset involved was acquired by the trustee before, on or\nafter its effective date, except that this article shall not apply to a\ntrust while any current beneficiary is interested in a unitrust amount\npursuant to subparagraph 11-2.4(b)(1); but it does apply with respect to\nassets to which such a unitrust may become entitled but prior to their\nactual receipt into the unitrust.\n