If the adoption of a Native American child is vacated or terminated by court order or adoptive parent relinquishment, the court or agency authorized by the court will attempt to give notice to the biological parent(s) or prior Native American custodian that they have a right to petition the court for custody of the child. If the parent(s) or prior Native American custodian cannot be located, notice will be given to the child's tribe. All notice and preference requirements will be observed before making another foster or adoptive placement.