The notion of “international law” is very limited. What may appear as an international law is often the concurrent application of the national laws of those sovereign nations which have ratified the same treaty. Here in the States, the Senate ratifies treaties.

Take, for example, the Berne Convention for the Protection of Literary and Artistic Works. If the copyrighted material was published in the U.S. then, as both Australia and the U.S. are signatories, an arrest warrant may be issued for an Australian accused of violating an American’s copyright. (Article 5, Rights Guaranteed:1. and 2. Outside the country of origin; 3. In the country of origin; 4. “Country of origin”)

Whether the accused had never traveled outside Australia would not matter.

__________________
Eudaimonia