Well, you don't need any NOC to visit Kashmir upto Taobut. If you plan to go beyond Taobut or want to go to Skardu via the same route, you will need to pass through Minimarg and this area is restricted for civilians. So for crossing that you will need a NOC. NOC is obtained from GHQ, you need to tell names of all members of your group, entry and exit dates along with your NIC. That's what I know so far.
We actually did not applied for NOC, later we changed plans to go via Nori Top rather than via Minimarg. BUT now everything is changed even the destination.
We have new plans for Khanjrab Pass via KKH. So far we have plans to follow this route
Abotabad, Mansehra, Naran
Babusar Top, Chillas
Gilgit, Naltar Valley
Hunza Valley(Biltit, Altit fort etc)
Ataabad Lake and then
Return route will be same but rather than coming via Naran, we will return via
and enter into AJK and will enjoy Neelam Valley on return.