Here's what the NC "must notify statute says:
The person shall carry the permit together with valid identification whenever the person is carrying a concealed handgun, shall disclose to any law enforcement officer that the person holds a valid permit and is carrying a concealed handgun when approached or addressed by the officer, and shall display both the permit and the proper identification upon the request of a law enforcement officer
...holds a permit AND is carrying... There's your answer. No gun; no need to notify.