N.Y. Estates, Powers & Trusts Law § 5-1.1-A
(a) Where a decedent dies on or after September first, nineteen hundred ninety-two and is survived by a spouse, a personal right of election is given to the surviving spouse to take a share of the decedent's estate, subject to the following:
(4) The share of the testamentary provisions to which the surviving spouse is entitled hereunder (the "net elective share") is his or her elective share, as defined in subparagraphs (1) and (2), reduced by the capital value of any interest which passes absolutely from the decedent to such spouse, or which would have passed absolutely from the decedent to such spouse but was renounced by the spouse, (i) by intestacy, (ii) by testamentary substitute as described in subparagraph (b) (1), or (iii) by disposition under the decedent's last will.
(b) Inter vivos dispositions treated as testamentary substitutes for the purpose of election by surviving spouse.
(1) Where a person dies after August thirty-first, nineteen hundred ninety-two and is survived by a spouse who exercises a right of election under paragraph (a), the transactions affected by and property interests of the decedent described in clauses (A) through (H), whether benefiting the surviving spouse or any other person, shall be treated as testamentary substitutes and the capital value thereof, as of the decedent's death, shall be included in the net estate subject to the surviving spouse's elective right except to the extent that the surviving spouse has executed a waiver of release pursuant to paragraph (e) with respect thereto. Notwithstanding the foregoing, a transaction, other than a transaction described in clause (G), that is irrevocable or is revocable only with the consent of a person having a substantial adverse interest (including any such transactions with respect to which the decedent retained a special power of appointment as defined in 10-3.2), will constitute a testamentary substitute only if it is effected after the date of the marriage.
(c) General provisions governing right of election.
(3) The right of election is personal to the surviving spouse, except that an election may be made by:
(d) Procedure for exercise of right of election.
(e) Waiver or release of right of election.
(3) Such a waiver or release is effective, in accordance with its terms, whether: