The binding legal principles established are:
1. To establish an Article 13(b) defense under the Hague Convention, the abducting parent must prove on a balance of probabilities that there is a grave risk that the child's return would expose the child to physical or psychological harm or otherwise place the child in an intolerable situation.
2. Courts must consider whether protective measures, undertakings, and conditions can ameliorate or eliminate the alleged grave risk before refusing a return order. If adequate protective measures are available in the state of habitual residence, the child does not in fact face a grave risk as contemplated by Article 13(b).
3. Even where an Article 13(b) defense is established, the court retains residual discretion whether to order return, and must balance the child's interests with the general purposes of the Hague Convention.
4. The Hague Convention presupposes that a child's best interests are ordinarily served by prompt return to the country of habitual residence, where custody and care matters can be properly adjudicated. The "best interests" enquiry in Hague proceedings is limited and must be evaluated within the framework of Article 13(b) exceptions.
5. Developmental delays, medical issues, or parental conflict do not automatically establish grave risk if there is no evidence that appropriate interventions and protections are unavailable in the country of habitual residence.
6. Courts deciding Hague Convention applications must conduct a two-pronged enquiry considering both short-term and long-term best interests of the child, while giving effect to the Convention's objectives.
7. An abducting parent cannot rely on consequences of the wrongful removal or retention (such as bonds formed during the retention period or delays in proceedings) to create or bolster an Article 13(b) defense, as this would subvert the Convention's aims.