N.Y. Est. Powers & Trusts Law § 10-4.1

§ 10-4.1 Rules for creation of a power of appointment.\n (a) The donor of a power of appointment:\n (1) Must be a person capable of transferring the appointive property.\n (2) Must have created or reserved the power by a written instrument\nexecuted by him in the manner required by law.\n (3) Must manifest his intention to confer the power on a person\ncapable of holding the appointive property.\n (4) Cannot nullify or alter the rights of creditors of the donee, as\ndefined in this article, by any language in the instrument creating or\nreserving the power purporting to give the interest of such donee a\nspendthrift character.\n