I currently have this exact same problem. I need to change the date of the first segment (CAI-LHR) on four AONE ex-CAI tickets, all issued before the huge price rise. The itineraries will remain unchanged; same flights, only the first date needs to be altered (3 days earlier).

As the tickets were issued ex-CAI, I assume that no re-issues are necessary - however maybe they'll need sticker updates.

The Star files I have are more than a year old. Could somone kindly direct me to the latest rules so that I can print and inwardly digest them?

Thanks.