Police say they will fine refugee supporters $5000 each if they stand in pairs, 1.5 metres apart and wearing masks, outside the Mantra Bell City hotel.
RAC had planned to organise a series of COVID-safe gatherings, an hour apart, on Saturday 3 October to protest a Federal Government Bill that would deprive refugees and asylum-seekers in detention of their mobile phones.
RAC had also planned a media conference, which police say would also attract fines.
The in-person event has now been cancelled. RAC is considering ways in which the media conference might proceed.