Same filter.
Yes to both. The Council of Thirteen must approve the making of a new Bachiyr. That's not to say that there aren't unauthorised turnings beyond my own but they're usually by Bachiyr looking for expendable people and if they're not killed by whoever they're sent after, the Bachiyr who turned them will usually kill them once they're no longer useful.
One thing I have found out it that loss of control is one of the reasons why turnings must be sanctioned. If my turning had been sanctioned, Theron would have been present when I rose and would have controlled the situation.