Vehicle Standards Bulletin 12 (VSB12)

Vehicle Standards Bulletin 12 (VSB12): National Code of Practice Rear Marking Plates for all motor vehicles over 12t GVM and for all trailers over 10t GVM, is the national standard for rear marking plates that identifies the types of plates that can be used, where they are placed on the vehicle and the methods for installing them.

It is a regulatory requirement that marking plates be placed on the rear of certain motor vehicles and trailers in order to improve their visibility and to provide the DO NOT OVERTAKE TURNING VEHICLE warning to other motorists.