When we first started having to be registered to fly an rc aircraft with the FAA, there were all kind of ways that people were trying to come up with to side step the the need to register and be subject to the rules. . Some asked if a multirotor was tethered, does it still need to be registered. As far as I know the answer was still yes. Well, what about control line airplanes? They are tethered by the control lines. Although not rc are they exempt? Can cl planes fly in NFZs? You may say they are not controlled by radio. Now in the past some cl planes were connected to a central pivot post by lines and rc equipment installed so pilot could be outside of circle. Thoughts? Also, what if a AMA flying field falls within a NFZ or close to an airport. Are they exempt?