Yes.The way I read it OFF Duty officers in the list that have a CPL can carry in pistol free zones, and I think they can carry concealed.
Open carry only if you have a CPL.The rest of us can not, the way I read this.
There is no AG opinion on this issue. The closest one is the reserve officer with CPL openly carrying is not brandishing, also defined brandishing as the term set forth by common law (to wave or display in a threatening manner) which also put forth solid ground that open carry, by anyone, is not brandishing. An LPI is covered under the above statute. Note it only applies to the actual investigator whom is licensed, not an employee of such.Of course you may have found a different AG opinion, but the one I seem to recall reading also was specifically addressing a licensed private investigator.
If you are a joe schmoe, you can open carry in a hospital if you have a CPL. The worst case is they ask you to leave, because it's private property. There is nothing illegal about it. If you are a licensed PI, you may carry concealed in the pistol free zones with your CPL.I eagerly await your post with more information because I would like to be able to stop at my wife's place of work while armed, but she works in a hospital.