I asked CPlus today about some of the specifics. They always seem to start with the answer "June 1", because that's when CP leaves oneworld.
Q: (me) Until when can I earn points on Cathay Pacific?
A: (CPlus agent) August 17.
Q: Do they count as qualifying miles?
A: Yes.
There might be something about having to book before June 1, but I'm not sure. Details, details.
FewMiles..