Do you mean the list of AMA sanctioned fields? I`m assuming there are some fields that are not sanctioned by the AMA that are legal to fly on provided the rules are followed as viewed by the FAA. As far as I know they can be in controlled or uncontrolled airspace. I think I saw on here where some R/C pilots were flying at civilian and military airfields. Arrangements and permissions had been in place for some time. All I`m saying is that if you really want to fly there is nothing stopping you. If the flying field that I belong to gets shut down, than yes, I and they who also belong get hurt. But it doesn't have to be permanent. Some who have been in it for a long time may decide to give it up. Others like me will keep an eye open to find another place to fly.