Which is why I am looking it up - although I think the Patriot Act(s) would take care of the unique issue of an al Qaeda terrorist vs. Hispanic gardener - I would have to say that ANY shelter should be given (although the priest risks going to jail just like if I harbored a criminal). I wonder if there an extradition treaty with the Vatican (given the history of "sanctuary" and the Church's predisposition toward mercy I would not be surprised if the Vatican has no extradition treaties at all, but I still need to ask). I am still formulating this response.