"Can a casino representative show up on the Convention floor and request their chips back and what would be the out come if that one day became reality."

They could and if you refuse, gaming could be called and my guess, NV state law would be inforced.

I doubt it would happen.

Gaming is at most of our conventions.

At 2010 convention the agent told me they were looking for certain N NV chips. Never heard if they found them.