This goes back to an earlier question. I'll be very brief.
In a procurement dispute, there are a number of routes you can take. One is to the CITT. One is to the Federal Court, with an application for just a review, an administrative process where you're asking the court to determine whether a decision was made with the proper authority. The other is to go off to the regular courts in seeking damages.
In the context of the application for judicial review, that's where I can see the ability to challenge the invocation of a national security exception if you're impacted by it. The Federal Court will look at whether or not the decision was made with the proper authority. I don't think you're going to get them to look at whether or not there's a legitimate national security interest at play.