Believe me, I have studied the administrative divisons of Ukraine (new and old) a lot, and it's not like that. The districts have become larger by merging, but their borders do not always follow the old ones, there are some districts where a few settlements changed hands or dsitricts that were split in half. Then the old districts didn't always become communities, although sometimes. The old communities were merged together into new bigger ones, but they almost never follow the boundaries of the old districts. And with this there is also no 4th level, there is still 3 just like there were, but all except the 1st with different borders. Now like I said this was all done on the basis of merging and amalgamating the communities, there was no border "redrawing" in the strict sense, so if we have the old divisions down to the communities the new ones can be easily done. I have in fact already done the new divisions for the oblasts that we have finished already.