TAB.... sheesh.
You cannot trespass in a PUBLIC TRANSPORTATION area. You can Loiter... but that's different. It's like saying you're trespassing on the sidewalk.
The bill allowed carrying concealed at insecure PUBLIC TRANSPORTATION AREAS... anywhere you don't have to pass through a metal detector / anyplace not prohibited by federal law.
The great thing about Concealed carry is that even places that claim to be "Gun-free zones", if not backed by state/federal law can only ask you to leave (IF IT'S PRIVATELY OWNED [MALLS ETC.]) if they find out you have a gun, but if it's concealed, they won't find out.
Besides, Gun-Free zones are the safest places to be.... ask VA-Tech and the Utah mall people.