Good question.
Kind of like DC laws? Where it was ok for david gregory to have a 30rd magazine but you can bet if we left one in the back of the car and got caught we’d be coolin’ our heels in the ol’ hoosegow for a while. (That is unless you have your “I’m a radical left wing extremists who wishes to crush the bill of rights” ID card on you which would exempt you from DC laws.)
Grrrrr! :>(