You do remember OSU did run their own Smartnet system. Everything was on it.
Pretty much the same with MARCS.
Again, not the same thing. There are channels in 800 MHz that can be used by non-public-safety groups/companies. Not so common now, but there was a lot of Smartnet and EDACS and even LTR systems on certain 800 channels that were general business systems. But Again, this is an FCC rule, not a state thing. It doesn't vary from state to state.
There are channels that are public safety only. By law. 700 MHz is entirely public safety only. But as I said above, some things like school buses, public transportation, and now even some utilities, like First Energy, have been "grandfathered" in with an FCC waiver.