I also find it very frustrating that it is difficult to find fare rules after the booking has been made. I am usually most interested in knowing if there is refund or whether changes can be made to dates on "save" fare classes. During the online booking process it is relatively easy to find the summary by clicking on the fare class, but unless I've printed it (which I rarely do), it's hard to find it again. It would be helpful if the link to the summary fare rules could be found in "manage my booking". Anyway, I found this link relatively helpful, although the summaries are grouped under "business save" etc., rather than the fare class letter.

https://www.cathaypacific.com/cx/en_...onditions.html