Originally Posted by
Mwenenzi
USA law only applies for USA. USA does not make laws for or in New Zealand.
If a flight was purchased in New Zealand, NZ laws will apply.
New Zealand is a sovereign country.
You are incorrect. US laws are often extra-territorial and US DOT is one that is. Similarly, other US laws such as the FCPA, Bank Secrecy Act, and Anti-Kickback Act are also extra-territorial.
If a ticket was purchased in New Zealand for travel to/from/within the US, both NZ and US law applies to it.