If they keep the same BK (boxkey) and RSA every thing will be fine...
Info :
CCcam doesn't work directly with Nagra3. we have to use newcs to read the card, and mpcs to "transfer" it to cccam, in this config we shod use cccam 2.0.4. to the card appear in hop1 to your peers if you use another version your peers will see your card in hop 2 this was a very nasty known bug. It allows CCcam to show cards received from N...but is another discussion about Mbox and Gbox opens definetely nagra 3 cards. don't read the card directly, but opens the cards...
I'm talking about rom142 for tvcabo and rom 180 for D+, both on Nagra3 at hispassat 30ºW but i think will be about the same.