Once again for clarity (refer my previous post #257), it was NOT Auckland air traffic control's responsibility to pass the amended TAF on Norfolk Island to the Pel Air aircraft. The NZ civil aviation rules clearly indicate that it is not.
If Airservices' staff Jason Harfield and Peter Hobson believes it was, then this is an issue that should have been further investigated and commented on by the ATSB.
The NZ AIP is just that - an Information publication. It is not binding on an adjacent provider, and may in fact be plain wrong.
Given that NF lies well within airspace controlled and managed by Airways NZ, I can't imagine why Airservices/BNE CEN would be providing FIS for NF, particularly since they wouldn't know about traffic proceeding there from the east and the Pacific.
In any case, an agreement to provide a service or services inside another provider's FIR would be covered by a memorandum of understanding/letter of agreement, detailing exactly who will provide what and where. If such an agreement exists re the provision of FIS re NF, then no doubt Airservices or Airways NZ will be able to produce it to prove responsibility.