The U.S. Supreme Court, increasingly drawn into disputes over international child abductions, ruled on Wednesday that a treaty’s one-year period to demand return of a child cannot be extended because the abducting parent concealed the child’s location.

When a parent flees with his or her child to another country, Article 12 of the Hague Convention on the Civil Aspects of International Child Abduction generally requires that country to return the child immediately if the other parent requests return within one year.