[spookypt]

I note this doesn't help explain why but for CAMS events in QLD the policy states.....

NOTE: All road registered cars (Trade Plates are not acceptable) must have an original 3rd Party extension certificate on their current Qld Registration
(under the "Transport Operations Road Use Management - Vehicle Registration) Regulation 1999") provided by the 3rd Party insurer, specifically
covering the days of each competition. Failure to provide this requirement by Qld State Government will result in your entry being refused at
administration check.