Any Indian child who is the subject of any action for foster care placement or termination of parental rights under State law, any parent or Indian custodian from whose custody such child was removed, and the Indian child’s tribe may petition any court of competent jurisdiction to invalidate such action upon a showing that such action violated any provision of sections 1911, 1912, and 1913 of this title.

Upon application by an Indian individual who has reached the age of eighteen and who was the subject of an adoptive placement, the court which entered the final decree shall inform such individual of the tribal affiliation, if any, of the individual’s biological parents and provide such other information as may be necessary to protect any rights flowing from the individual’s tribal relationship.

Where any petitioner in an Indian child custody proceeding before a State court has improperly removed the child from custody of the parent or Indian custodian or has improperly retained custody after a visit or other temporary relinquishment of custody, the court shall decline jurisdiction over such petition and shall forthwith return the child to his parent or Indian custodian unless returning the child to his parent or custodian would subject the child to a substantial and immediate danger or threat of such danger.

In any case where State or Federal law applicable to a child custody proceeding under State or Federal law provides a higher standard of protection to the rights of the parent or Indian custodian of an Indian child than the rights provided under this subchapter, the State or Federal court shall apply the State or Federal standard.

Nothing in this subchapter shall be construed to prevent the emergency removal of an Indian child who is a resident of or is domiciled on a reservation, but temporarily located off the reservation, from his parent or Indian custodian or the emergency placement of such child in a foster home or institution, under applicable State law, in order to prevent imminent physical damage or harm to the child. The State authority, official, or agency involved shall insure that the emergency removal or placement terminates immediately when such removal or placement is no longer necessary to prevent imminent physical damage or harm to the child and shall expeditiously initiate a child custody proceeding subject to the provisions of this subchapter, transfer the child to the jurisdiction of the appropriate Indian tribe, or restore the child to the parent or Indian custodian, as may be appropriate.

None of the provisions of this subchapter, except sections 1911(a), 1918, and 1919 of this title, shall affect a proceeding under State law for foster care placement, termination of parental rights, preadoptive placement, or adoptive placement which was initiated or completed prior to one hundred and eighty days after November 8, 1978, but shall apply to any subsequent proceeding in the same matter or subsequent proceedings affecting the custody or placement of the same child.