"International law is part of our law, and must be ascertained and administered by the courts of…

In The Paquete Habana (1900), the United States Supreme Court, speaking through Justice Gray, held: "International law is part of our law, and must be ascertained and administered by the courts of justice of appropriate jurisdiction." It applied the customary rule that coastal fishing vessels are exempt from capture in war.

The Corfu Channel case and the Lawless case were decided by international courts, and R v. Keyn (1876) was an English case about criminal jurisdiction over the territorial sea.