No rust just what does it mean

It apparently varies state to state. I sold my 74 Challenger to a fellow from Ohio who went on all about the bit of restoration, keeping in touch and sending pictures. Never heard from him again but saw it for sale later. When I sold it to him it had rusty lower quarters, some bubbling under lower vinyl roof, some in lower fenders. Some surface rust on the step plate. It had been introduced suddenly to a concrete bridge and telephone pole by me and had a nice telephone pole sized dent in the fender and no bumper and smunched hood. I had straightened the frame and new radiator.

I had a friend call from Colorado to Ohio just out of curiosity. He did nothing to it and advertised it as a rust free Kentucky car. He said it is a good driver and had a small dent in fender that you could easily fix if you were picky.