I think that the use in either jurisdiction of their parallel chamber is different.
In the case of Westminster Hall, the items that can be referred to Westminster Hall are very scripted in terms of who can send an item to the chamber each day. Mondays are taken up by a new creation of theirs that was studied by procedure and House affairs last session, e-petitions. The e-petitions committee, which is a brand new committee, has the ability to send e-petitions for debate to Westminster Hall. That would have been how that item would have arrived.
On Tuesdays and Wednesdays, my understanding is that it's sort of like the adjournment proceedings that happen here at the House. Those are taken up via some random draw that members sign up for at the Speaker's office in the House to be able to participate in Westminster Hall.
Thursdays are scheduled by a British creation called the backbench committee, which allows backbench members to put forward items of business. Apparently at 35 sittings in a session, the backbench committee can put forward items of business to be considered. Twenty-seven of them have to be in the main chamber and the rest can be in Westminster Hall.
It's very circumscribed what business can be sent there.
From what I gather, for the Federation Chamber it's a little different. It seems as though you can bring bills forward for a second reading. If I read it properly, it says “close examination”. That might be like our clause by clause. You could do that at the Federation Chamber, and if there was consensus to move it forward, you would report it back to the House.