South Australian Consolidated Regulations South Australian Consolidated Regulations61—Warning signs not to be displayed on other vehicles
(1) A road train
warning sign must not be displayed on a vehicle unless the vehicle is part of
a combination or road train mentioned in rule 60 (1) or (2).
(2) A long vehicle
warning sign must not be displayed on a vehicle unless the vehicle is a part
of a combination or road train mentioned in rule 60 (2) or (3).