I have similar concerns, and I'm really on the same page as Ms. Duncan here, surprisingly.
Proposed paragraph 119(2)(b) is the saving clause for procedural fairness and natural justice, so any applicant is entitled to know information that is relevant to his or her project in order to provide them with an opportunity to respond. But if in fact this information is actually kept secret, how would the applicant even know that information is being considered that may be prejudicial to their interests?
I've raised this before as a serious concern. I fully understand that there may be circumstances in which an indigenous group will want to protect information to ensure that, for example, there isn't a disturbance of heritage sites or religious sites of significance. But it is absolutely critical that applicants have information available to them that would allow them to meet any challenge that the tribunal faces. It would be interesting to hear from our officials on how that procedural fairness will be guaranteed.