Let's see. I've just been stopped by LE. Let me think... What state am I driving in today? Do I have to declare? All this stress and I'm able to remember the rules here. Unlikely
When we train we learn techniques to take care of possible firearm faults. Methods have been developed to cover the most situations and require minimum analysis under stress.
Therefore, for me, I'm always going to turn on the interior lights, have my hands on the steering wheel, declare my CCW and my armed status. One method to cover all situations.