Explainer - With IS-linked former Australian Suhayra Aden set to arrive in New Zealand, security - for New Zealanders at large as well as her family - has been "front of mind" for the government. The Terrorism Suppression (Control Orders) Act - which took effect in December 2019, is a law which allows courts and police to place restrictions on people who may have been involved in terrorist-related activity overseas. So what's the deal? How would it protect people and what does it mean? RNZ is here to clear it all up. Photo: RNZ / Vinay Ranchhod How it works The 2019 law was prompted by fears Islamic State (IS) fighters would be allowed to return to New Zealand, with no way to restrict their activities or watch over them.