I read that as "..must not use facilities installed for permanent station use, or use any structure installed permanently for Field Day use"
Am I correct? We would like to use a park cabin.
The park cabin is OK. It is not set up specifically for FD.
The intent of the rule is to insure that FD stations which claim to be true "Field" stations (A, B) really are 100% "put up for Field Day".
The idea is to prevent things like the following from claiming to be "Field" stations
- Ham uses permanent antenna but puts battery-powered station in a tent out in the yard.
- Ham uses permanent shack but strings up temporary antenna
- Club member has a suitable location that club uses for Field Day. Over time they put up permanent masts with halyard ropes, ground rods, and bury coax and power cables - all of which get used once a year. Eventually it gets to the point that "setting up for Field Day" consists of tying the antenna ends to the halyards and hauling up, plugging the rigs and generator into the coax and power cables, and hooking up the ground wires.
None of the above are against the rules unless you want to claim "Field" (class A or B) status.
73 de Jim, N2EY