The “other reasons” that they're speaking of are a cut-and-paste job from the old legislation, which read that way. It would give the head of the institution the opportunity and the ability to place inmates into 31(3)(a) segregation, at any belief that there was the opinion that the inmate would be a threat to the general public or area. These are the other reasons that they speak about—security incidents that could arise, an inmate being disruptive, an inmate who fought with another inmate.
What's important to understand here is that they're trying to cancel out disciplinary segregation as well. There were two forms of segregation here. As a federal prisoner, I spent time in both. I spent 2,500 days in administrative segregation, not including or withstanding the other form of punitive segregation, which was disciplinary segregation for the offences of my actions. When we look at these areas, it's this way.