(b) The rights of an adoptive child to inheritance and succession from and through his birth parents shall terminate upon the making of the order of adoption except as hereinafter provided.

(c) The adoptive parents or parent and the adoptive child shall sustain toward each other the legal relation of parent and child and shall have all the rights and be subject to all the duties of that relation including the rights of inheritance from and through each other and the birth and adopted kindred of the adoptive parents or parent.

(d) When a birth or adoptive parent, having lawful custody of a child, marries or remarries and consents that the stepparent may adopt such child, such consent shall not relieve the parent so consenting of any parental duty toward such child nor shall such consent or the order of adoption affect the rights of such consenting spouse and such adoptive child to inherit from and through each other and the birth and adopted kindred of such consenting spouse.

(e) Notwithstanding the provisions of paragraphs (a), (b) and (d) of this subdivision, as to estates of persons dying after the thirty-first day of August, nineteen hundred eighty-seven, if:

(1) the decedent is the adoptive child's birth grandparent or is a descendant of such grandparent, and

(2) an adoptive parent (i) is married to the child's birth parent, (ii) is the child's birth grandparent, or (iii) is descended from such grandparent, the rights of an adoptive child to inheritance and succession from and through either birth parent shall not terminate upon the making of the order of adoption. However, an adoptive child who is related to the decedent both by birth relationship and by adoption shall be entitled to inherit only under the birth relationship unless the decedent is also the adoptive parent, in which case the adoptive child shall then be entitled to inherit pursuant to the adoptive relationship only.

(f) The right of inheritance of an adoptive child extends to the distributees of such child and such distributees shall be the same as if he were the birth child of the adoptive parent.

(g) Adoptive children and birth children shall have all the rights of fraternal relationship including the right of inheritance from each other. Such right of inheritance extends to the distributees of such adoptive children and birth children and such distributees shall be the same as if each such child were the birth child of the adoptive parents.

(h) The consent of the parent of a child to the adoption of such child by his or her spouse shall operate to vest in the adopting spouse only the rights as distributee of a birth parent and shall leave otherwise unaffected the rights as distributee of the consenting spouse.

(i) This subdivision shall apply only to the intestate descent and distribution of real and personal property. 2. (a) Except as hereinafter stated, after the making of an order of adoption, adopted children and their issue thereafter are strangers to any birth relatives for the purpose of the interpretation or construction of a disposition in any instrument, whether executed before or after the order of adoption, which does not express a contrary intention or does not expressly include the individual by name or by some classification not based on a parent-child or family relationship.

(b) As to the wills of persons executed after the thirty-first day of August, nineteen hundred eighty-six, or to lifetime instruments executed after such date whether executed before or after the order of adoption, a designation of a class of persons described in section 2-1.3 of the estates, powers and trusts law shall, unless the will or instrument expresses a contrary intention, be deemed to include an adoptive child who was a member of such class in his or her birth relationship prior to adoption, and the issue of such child, only if:

(1) an adoptive parent (i) is married to the child's birth parent, (ii) is the child's birth grandparent, or (iii) is a descendant of such grandparent, and

(2) the testator or creator is the child's birth grandparent or a descendant of such grandparent.

(c) A person who, by reason of this subdivision, would be a member of the designated class, or a member of two or more designated classes pursuant to a single instrument, both by birth relationship and by adoption shall be entitled to benefit only under the birth relationship, unless the testator or creator is the adoptive parent, in which case the person shall then be entitled to benefit only under the adoptive relationship.

(d) The provisions of this subdivision shall not impair or defeat any rights which have vested on or before the thirty-first day of August, nineteen hundred eighty-six, or which have vested prior to the adoption regardless of when the adoption occurred. 3. The provisions of law affected by the provisions of this section in force prior to March first, nineteen hundred sixty-four shall apply to the estates or wills of persons dying prior thereto and to lifetime instruments theretofore executed which on said date were not subject to grantor's power to revoke or amend.