Yeah, the "not permitted" language is bizarre. Not permitted by who? Is there a law? No. Did I sign a contract? Presumably also no, although I wouldn't be completely surprised to find out that dealers are getting people to sign this right away.

I had the same feeling when I read that as I do when I hear people say "it's not legal, it's just not illegal." First of all, this is nonsense. Things not being illegal is the literal definition of them begin legal. But I just don't understand this attitude at all. Like, do you think you need explicit permission to do anything? How sad is that?

All that being said, I wouldn't open that hood. :)