I do find it odd that we can gift APD's between us but not her upgrades. As far as Air NZ are concerned, it's not costing them more money so why would they care? It seems an odd restriction. She was on course to get Elite this year but then changed contracts from Auckland to Wellington so rarely needs to fly now, whereas she was flying up and down every week.
Gifting RU's is limited to Elite's.
Other being able to gift RU's would be a nightmare - you'd go from a low to moderate RU redemption (remember lots of people never use their upgrades) to suddenly having somewhere in the vicinity of 200,000 RU's potentially being redeemed. Getting RU's cleared can be difficult enough now, I even had a friend flying back from Singapore a couple of weeks ago that had 8 people at the gate still hoping for RU's to clear into BP. When you've only got 18 seats in total it's very clear they're not all going to clear.
They are an odd thing though because I suspect more people fly with a partner than alone, so who is going to want to be split up?!
Most people flying together are on the same PNR - and if you lodge a OneUp it has to be for both people on the PNR.
If you lodge an APD Upgrade or RU it can be for one, or both pax.
Not if the Pax lodging the RU is not Elite. RU can only be for the Gold member even if travelling together. We asked Air NZ explicitly on several occasions.