I don't think that this is an additional layer necessarily. We have a legislative scheme that has been put in place here, and the creation of a committee by legislation, which is really the prerogative of Parliament. The legislation can have it.
In creating that body, Parliament decided to have this safety aspect, if you will, that since the committee might have to look into some confidential information, then all of the staff and the members would have to take an oath. Otherwise, it could be something left to the committees to go with individually, at least on different sides of the Parliament.
In this case, it was to be consistent with the business at hand, if you will, that in some cases it might be confidential. So from the get-go, everybody will take an oath.