The Australian Design Rule 42.9.1 states:

"No vehicle shall be equipped with any object or fitting, not technically essential which protrudes from any part of the vehicle so that it is likely to increase the risk of bodily injury to any person."

Letter from Mike Hannon - RTA - Tow-bars

Examples: Protruding tow-bars/bike-racks & obstructed and defaced number plates

Minutes of PCA meeting with Chief Executive RTA - 4 June 1998 re towbars

Memo from Chris Ford to Ron Christie re tow bars - March 1998

Letter to Paul Forward (RTA) from (NRMA) re towbars and bullbars 28 July 1999