Any assistance appreciated.

Booked premium economy return flights London - Auckland with Air NZ. First flight is with Singapore and final flight with Virgin (other two Air NZ).

Ticket says “Air NZ baggage rules applies”. But on the carry-on section it only refers to the rules for “Air NZ operated services” and makes no reference to the others.

(The Air NZ carry-on allowance for premium is far better than Singapore and Virgin. And given the lost luggage problems I would like to avoid putting luggage in the hold.)

What will be the carry-on rules for each flight? Air NZ or the operating airline?

Thanks