Why are you so mad at me, I'm not even the OP you should ask these questions. I'm also not convinced we need regulation like this in the first place, so I can't tell you where this boundary should be, but a boundary could certainly be found and it would be beyond simple spellchecking autocorrect.
I also don't understand why you think this would be so impossible to define. There are regulations for all kinds of areas where specific things are targeted like chemicals or drugs and just because some of these have incentivized people to slightly change a regulated thing into an unregulated thing does not mean we don't regulate these areas at all. So how are AI systems so different that you think it'd be impossible to find an adequate definition?
I also don't understand why you think this would be so impossible to define. There are regulations for all kinds of areas where specific things are targeted like chemicals or drugs and just because some of these have incentivized people to slightly change a regulated thing into an unregulated thing does not mean we don't regulate these areas at all. So how are AI systems so different that you think it'd be impossible to find an adequate definition?