1. You will no longer be able to upgrade anyone flying on the same flight. After February 28, 2011, you will only be able to sponsor the upgrade of one other traveller on the same reservation with you.
Source:
http://www.aircanada.com/en/aeroplan...des/share.html
2. If you want to sponsor upgrade for more than one traveller on the same reservation or someone not on the same reservation with you, you will have to add them as your Nominees.
3. For Nominees who are non status and not travelling with you on the same reservation, the earliest that you can request an upgrade is 7 days in advance with a Latitude fare.
Source:
http://www.aircanada.com/en/aeroplan...des/howto.html
4. It’s my understanding that the eUpgrade Credits will be deducted from your account as soon as the upgrade clears, and simultaneously re-credited back into your account when you cancel. Therefore, you will no longer be able to hedge multiple upgrades as in the past unless you actually have the eUpgrade Credits in your account.
If my understanding is incorrect, please advise.