I was replying to the word permanent, as I understand what Sine die means and thats not the same thing!But that's the thing - 'sine die' doesn't mean permanently. It just means that as yet, no specific date has been set for the end of the ban. Another way of putting it, is that that the person is suspended 'until further notice.' As @RobOda's post mentions, a sine die ban may potentially be reviewed after a minimum of 5 years but it still means there is no fixed date on which it comes to an end.