Don't over think this. The safest place for your firearm in on your person. A silly rule at some facility, unless backed up with an actual risk of criminal prosecution is not worth worrying about, and if you are careless enough to be perceived as being armed in that setting you need to pay someone to apply slap therapy. I only disarm in the most unusual settings, and it is roughly 25 years since I was perceived to be armed by a person hostile to the concept. (And yes, that was my fault. Shame on me.)

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NHI, 10-8.