According to the law, the person's time there will be as short as possible. The critical thing is that for the entire time they are in a structured intervention unit, they will receive the treatment they need to modify their behaviour, to deal with mental health issues, to be counselled—in the case of indigenous people, for example, by elders—and to be visited by the John Howard Society or the Elizabeth Fry Society. They will receive the kind of interventions and attention that will reduce the risk they pose and make it more likely that they can successfully return to the general population.
The problem with the previous form of administrative segregation—as it was called, and before that, solitary confinement—is that for 22 hours a day, that person was alone in a very dark place, probably getting worse, probably increasing the danger and the risk. The objective here is to create a different environment that will allow treatment and other interventions to continue. Their mental health will improve and their other difficulties will be reduced. They will become less of a risk, both inside the institution when they return to the general population, and outside the institution when they are eventually released.
The focus is on treatment and detention.