Sorry I am late to the party on this one. I had this very argument with 4 officers at the scene of the original stop and 3 officers after the fact.
The short answer is, NO. You do not have present a CC permit if OCing and stopped by police.
And now, the back story.
I am a permit holder and was stopped while I was OC. The officer never asked for my permit and was extremely upset when he learned that I had one. All officers at the scene were of the understanding that it was my duty to inform the officer of my permit.
The catch, as explained it to all 7 officers, was that I was not carrying in accordance with the above mentioned law, the officer never asked for my permit, and his approach was "to talk" with me.
Needless to say officers at the scene were not happy when I stood my ground and told them they were wrong and that I would happily go to jail with them if they wanted the headache that goes along with it.
After the fact, someone I know personally, "on the force" wanted to speak with me concerning how I "should" have handled the incident. I told him, that because we are friends, I would allow him the opportunity to read the law and comprehend what it says before calling me back.
Turns out, I was right. Go figure. Of course every situation is different and everyone reacts differently to being stopped.