The Greens and the WA Anti-War Collective said they were aware of six people who had received police letters this week banning them from entering the security zone that will be in place around the Perth Convention and Exhibition Centre from Thursday.
The security zone, created under powers passed by WA parliament last month, covers the convention centre and Elizabeth Quay busport for a period of 10 days around the event. Within the zone, police can ban people, stop and search anyone, remove face coverings, and confiscate a range of items including speakers, microphones, dangerous animals, insects (including bees), and items that could be used as weapons such as flares and bottles.
WA Police Commander Darren Sivright, the senior officer in charge of the operation, described the security zone as a "fort".
Activists have slammed the Cook government for what they describe as "draconian" police powers that restrict the right to protest near the defence industry trade show.