Conditions of Carriage here . "Rule 15.5" down the list to the bottom. The ongoing question is does DOT technically trump their own local conditions of carriage. It may do but it may also take the first test case to fall either way before this all gets tidied up. For now ANZ are sitting in the grey zone and relying on customers not to push this - for obvious implications.
https://www.airnewzealand.co.nz/conditions-of-carriage
thanks I didnt think to look at their CoC 15.5 as we specially asked what part of the DOT regulation states it's not applicable to non US citizens & bookings which they are hiding behind, they then said US DOT reg 15.5
I think you are correct until someone kicks the can well down the road they will hold the line.