and here is the
OFFICIAL answer from the NSW
roads and whatever they are called now...
"Thank you for your email.
You may
move your number plate so that the plate is visible on the vehicle.
Positioning and display of number plates:
Customers issued with two number plates must display both plates on their vehicle. One must be affixed to the front of the vehicle and one to the rear.
Customers issued one number plate (eg for motorcycles and trailers) must affix the plate to the rear of the vehicle.
Where two different size plates are issued, the smaller plate must be affixed to the front and the larger to the rear of the vehicle.
All number plates must be:
i. In an upright position that is substantially parallel to the vehicle's axles.
ii. Not more than 1.3m above ground level.
The characters on the number plate must also be clearly visible from a distance of 20m at any point within an arc of 45 degrees from the plate(s).
http://www.rms.nsw.gov.au/documents/roads/safety-rules/standards/vsi-58-number-plate-visibility.pdfAuxiliary plates must not be issued for Trailers, Caravans, Motorcycles, Tow trucks, Public vehicles, Trade plates and Conditionally Registered vehicles.
For further information please call Service NSW on 132 213 (Monday – Friday 7am to 7pm) to discuss with a Customer Service Representative.
Please Note: The information contained in this email is current at the time of writing.
Kind Regards
Bernadette
Customer Service Representative
Rmsregistration_licencing@service.nsw.gov.au"
So there ya go. remove the plate from the trailer and fit it to the bike rack and make sure it is both lit, and the correct height.
I think I'll be printing this out and carrying it with me though...