I think it is hard to tell, because the laws are different in different countries. I would suspect that they all are because they all have swearing in them, but like I said, it is hard to tell.
Sorry, I have no idea about America. I'm guessing that since Walmart wouldn't even stock '21st Century Breakdown' , Americans are super-sensitive about that kind of thing, so I think they probably all have the "Parental Advisory" sticker.