By the standards of any other prison, Belsavis's Minimum Security Section would be considered escape-proof‒a tightly controlled, heavily monitored maze of cell blocks, guard towers and work yards. By Belsavis standards, the Minimum Security Section is just what the name implies‒the absolute minimum level of security acceptable for holding the worst criminals in the galaxy.
The inmates in the Minimum Security Section consist mainly of murderers, pirates, gangsters and other violent criminals who possess a humanoid physiology and a willingness to communicate (if not cooperate) with prison authorities. Prisoners who require specialized holding facilities are shipped to higher-security areas, but here, inmates are permitted to gather and to work, albeit under strict supervision.
When the Empire inserted its forces onto the planet, it converted the remains of a camp used by early Republic explorers into a fortified lodgment. From there, Imperial forces have made surgical strikes to breach cell blocks and obliterate dividing walls. The Republic has since pulled many of the Belsavis guards and their families to relative safety in the prison's security and administrative centers.