I'm not a lawyer, but the EFF mentions tractors in their press release:
> We are pleased that analysts will now be able to examine the software in the cars we drive without facing legal threats from car manufacturers, and that the Librarian has acted to promote competition in the vehicle aftermarket and protect the long tradition of vehicle owners tinkering with their cars and tractors.
> We are pleased that analysts will now be able to examine the software in the cars we drive without facing legal threats from car manufacturers, and that the Librarian has acted to promote competition in the vehicle aftermarket and protect the long tradition of vehicle owners tinkering with their cars and tractors.