Board Thread:Naruto Discussions/@comment-30881771-20170815144139/@comment-25122992-20170815151727

And why should be get a permittion? I mean, there's a lot of guys in Naruto series who developed their own powerful techniques, and no reason to believe they asked the authorities about the permittion to do so. For example, I severely doubt that Tobirama asked Fire Daymio for the permittion to create Edo Tensei, and it needs living sacrifices as you remember. However, Oro's cloning was seemingly neither forceful (for Shin himself) nor somehow immoral.