What is the NSW requirement for trailer break-away systems?

The NSW RTA has specific requirements for the break-away brake systems on caravan and trailers with a GTM rating over 2.0 tonne. Vehicle Inspectors Bulletin No 06 details the provision of a device to inform the driver (while in the normal seating position) of the charge-condition of the battery in the caravan/trailer, so as to provide a warning if the battery may be unable to activate the break-away brake system for the required 15 minutes.