My view is that as it currently stands, there is insufficient due process, because there's no oversight in the current scheme. The issue becomes one of identifying where it is salvageable, if you're using this legislation to try to bring in some external oversight?
I would say, given that you are providing at a minimum—and I'll say it's a minimum standard—four hours outside the cell, you could see that something like 30 days might be sufficient. It's very much an unproven territory, because we have strict guidelines with respect to the Mandela rules around at least 22 hours in the cell, with a great body of literature suggesting that is very harmful.
We probably know a little bit less about those restrictive environments, but the only thing I can tell you is that 20 hours in a cell is an awfully long time, and there has to be some oversight so that this does not become the norm for managing challenging offenders across the system.