The NSW police obtain a court order and take a person into custody because the police believe that person may commit a terrorist attack - HSC - SSCE Legal Studies - Question 18 - 2023 - Paper 1

This situation exemplifies the concept of preventative detention, where a person is taken into custody to prevent a potential criminal act, in this case, a terrorist attack. This legal measure is often undertaken when there is credible evidence that an individual poses a threat, and their detention is deemed essential for public safety.