Not according to the info I got .....as thats how your replace a failed NCDC unit.....you fit a new one which is in delivery mode and match it to the CID etc....
You get an error - the CID has not been security deactivated, or words to that effect when you attempt to pair...
...although if you know better, I'm all ears 
Seems a bit of a numpty way to do it if you ask me......if you get a fault with the headunit then....ie its dead.....or same with the CID, thats dead too.....as you carnt obviously unpair them.....you have to have a new headunit and a new CID......seems a bit excessive to me and blooming expensive if a vx dealer does it :-/
If the display fails, I think I can see a way round that - though the replacement display needs to be in delivery mode.
If the radio fails, then, yes, looks like new CID/NCDC/Telematics units required...
It also begs another question......why do they have to be paired in the first place???
And dependant on that answer i may have another question :-/
Non cyncical answer is anti-theft (NCDC range do not have radio codes).
Cynical answer I will keep to myself.
Bummer if some idiot nicks your stereo though....
Ahhh rite....didnt know that.....about not having codes for them

But i'll ask the question i was thinking of before anyways.....
If you did get a CID or head unit that wasnt unpaired.....couldnt you take it to places that advertise code unlocking on stereos/etc.....i mean this in a legal sense....ie not youve nicked it......but legally own it......
ie when i bought my veccyB.....the garage had let the battery go flat on it.....so when battery was charged the radio wanted the code entered.....but they didnt have it.....so they pulled the radio out and sent it to a local shop who reset the code....just wondered if same could be done with CID/head unit?
Understand if this is not answerable on a public forum :-/
