5. Do nothing. There is always the option to have a commission and leave the order to stew in its own juice. The problem here is that the Pope and the Vatican have had their wishes ignored in the Boeselager matter, so to do nothing may leave those who defied them claiming victory. 

Finally, its also within the Pope’s remit to break off the Holy See’s diplomatic relationship with the order, suppress the knights or abrogate their constitution - all three of which would be the equivalent of pressing the nuclear button. The point is that the Pope has options, and it will be fascinating to see the next step he takes."