What usually happens in our experience is they're perfectly able to confine these people, and they do so for weeks ahead of time. They say “Maybe we're going to transfer you; maybe you'll receive a notice”, but they don't get the formal official notice until 48 hours before the transfer, with all the stuff to respond to.
Ce qui se produit habituellement, d'après notre expérience, c'est qu'on peut tout à fait isoler ces gens, et qu'on le fait même des semaines avant le transfèrement.