(a) Within two years after a final decree of adoption of any Indian child by a State court, or within any longer period of time permitted by the law of the State, the State court may invalidate the voluntary adoption upon finding that the parent's consent was obtained by fraud or duress.

(b) Upon the parent's filing of a petition to vacate the final decree of adoption of the parent's Indian child, the court must give notice to all parties to the adoption proceedings and the Indian child's Tribe and must hold a hearing on the petition.

(c) Where the court finds that the parent's consent was obtained through fraud or duress, the court must vacate the final decree of adoption, order the consent revoked, and order that the child be returned to the parent.