Originally Posted by
caspritz78
In countries with an outbound border control you leave the country according to Visa regulations when you walk through the border control and into the transit zone.
I'm not sure that is correct in the case of countries which have international flights between two domestic airports (either as international shuttle ala NZ between AKL & CHC, or as tag leg for longhaul ala QF between SYD/MEL/BNE/CNS/ADL or NZ between CHC & AKL). In those cases you go through immigration control but are not processed as leaving the country on departure and likewise not processed as entering the country on arrival.
Originally Posted by
caspritz78
In a country without an outbound border control like the USA for example you exited the country according to visa regulations when you return your I-94. It shouldn't be possible to return into the United States without going again through immigration.
Maybe so, but it definitely is possible in some circumstances. Eg I94W stub removed at LAX UA F lounge but there was nothing stopping me from leaving the lounge and exitting landside afterwards.