Quote History Quoted:
Legal for CPL holder to carry in bank, both concealed or openly - YES
Legal for NON-CPL holder to carry in bank, openly - NO
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This is correct.
MCL 750.234d makes it illegal to possess a firearm on the premises of a bank, among other locations; however, CPL holders are exempt.
MCL 28.425o makes it illegal for a CPL holder to carry a concealed pistol in certain locations, but a bank is not one of them.
A CPL holder may carry a pistol in a bank, whether open or concealed. A person that does not hold a CPL may not carry a pistol in a bank.
As for post offices federal courts, those are federal property and you may not carry inside. Federal property falls under different law. A federal reserve bank would be the one bank you may not carry into, but I don't foresee many of us ever visiting a federal reserve.