Question: Where is the head office of the airlines who operated Norfolk Air's flights?
Sentence (from "Norfolk Air"): Although the flights were regulated as domestic flights, Norfolk Air's flights from the Australian mainland operated from the International Terminal at each airport and Australian citizens had to carry a document of identity or passport in order to pass through Customs and Immigration checks and board the aircraft, as Norfolk Island is an External Territory of Australia and outside of the Australian migration zone.
Relevant evidence: No