Michaelia Cash (WA, Liberal Party, Minister for Employment, Skills, Small and Family Business) Share this | Hansard source

Again, we're dealing in hypotheticals here, because I really don't know the nature of questions that may be asked at estimates. But certainly in relation to any estimates hearings there are grounds an official can rely on in the event that they believe they are unable to give an answer. That can then be challenged by senators, and there is then a procedure that, as you would be aware, the senators are able to go down. But certainly in this respect one would believe that it would be national security.