I agree, and the date of introduction aligns to the published date from the RBA for 'large merchants'. For the full RBA article: https://www.rba.gov.au/payments-and-infrastructure/review-of-card-payments-regulation/q-and-a/card-payments-regulation-qa-conclusions-paper.html

I am also wondering about that...  went through the process of having my separate PNRs linked for a trip early September (Qantas flight, followed by AA flight) but now not sure of what process I will end up having to follow....

I am assuming this policy will apply regardless of having booked the separate Qantas and AA flights some months ago? (or is there a chance it will only apply to bookings made post-July 1?)

Just an FYI, it is also available (when leaving) in Christchurch