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.
1039/smoothed out slappy hours, Kerplunk, insomniac, nimrod, warning, and shenanigans are NOT explicit in America, 1 track out of 15 is explicit on dookie, 7 out of the 12 tracks on American Idiot are explicit, 4 out of 20 tracks on 21st Century Breakdown are explicit, 1 track out of 21 is explicit on International Superhits, 7 out of 12 tracks are explicit on UNO, 6 out of 20 tracks are explicit on Awesome as F**k, 5 out of 14 tracks are explicit on bullet in a bible.
