Jurisdiction does not (necessarily) follow national borders.
The US claims jurisdiction over US citizens worldwide for certain tax matters, for example.
And Norway has laws intended to let Norwegian courts pursue residents that travel abroad to take advantage of legal systems that are bad at pursuing sex crimes against children even though the crime takes part outside Norwegian borders.
Many countries have laws for which the courts jurisdiction is either worldwide, or substantially different from the national borders.
The US claims jurisdiction over US citizens worldwide for certain tax matters, for example.
And Norway has laws intended to let Norwegian courts pursue residents that travel abroad to take advantage of legal systems that are bad at pursuing sex crimes against children even though the crime takes part outside Norwegian borders.
Many countries have laws for which the courts jurisdiction is either worldwide, or substantially different from the national borders.