I'm going to suggest that we say it should be members of Parliament who were present at the specific meeting. That way, if Mr. Hsu had been present at a meeting and he wanted to look it up, as the official signed-in member he would have access to it.
I was trying to remember in Parliament whether or not there's ever been this situation where something happened in camera with one committee and it was really important that a member from another committee really didn't have access to it at a certain point in time. I cannot recall.