Coroners and Justice Bill

I wonder whether the Lord Chancellor overstates a judge's latitude for determination in this matter. From my reading of amendment 97, the judge does not have the capacity to determine more than whether a protected matter would need to be revealed in order for the inquest to take place, and that it would therefore be necessary to hold an inquest without a jury in order to prevent it from being revealed. The judge does not appear to enjoy the clear latitude to determine whether the certification process that the Secretary of State undertook is, of necessity, correct. Perhaps I am misreading the amendment.