LEO wouldn't even be able to inquire if the person on private property with a gun had a permit or not......it's really not that hard to come to a reasonable conclusion.
That's a very circular definition, and despite that not complete.
The LEO can secure a gun without any articulable suspicion for his own protection, and in the appropriate circumstances inquire if the person has a permit.
It's really really hard to make those kind of blanket statements that are 100% true in all situations.