Can't remember the exact requirements for CPL, but they can easily be found from LASORS - it's free, and you can download a copy here:
LASORS
As for cross-country, I always though it was anytime when you left the circuit - for example I did practice navex's of two hours plus, covering over 100nm, but didn't land away.
Your school should also be able to answer all of this for you.
Good luck with it!
DW
