The ICPA report into last year's Parliament protest has found some laws governing trespass and arrests are ill-equipped to deal with policing mass public disorder events.
Just 31 people connected to last year's three-week occupation have been convicted in the courts so far, despite police charging hundreds of protesters in the aftermath.
Andrew Geddis, a professor at the University of Otago's Faculty of Law, spoke to Ingrid Hipkiss.