Vehicle Standards Bulletin VSB1, which covers the technical requirements stipulated by the Federal Department of Infrastructure and Regional Development, says that:
Special requirements in NSW
In NSW there is an extra requirement that the charge condition of the caravan breakaway battery can be monitored from within the towing vehicle.
The NSW Roads and Maritime Services (RMS) vehicle inspection bulletin VIB6 stipulates:
This ruling only applies to caravans registered in NSW, not to interstate visitors towing recreational vehicles (RVs) registered in another state or territory and travelling through NSW.
So if you are planning a trip and have not installed a caravan breakaway system, pop down to your local mechanic and discuss the installation and get some advice on the best way to proceed.
More information can be obtained on the RMS website
This blog post provided by: North Beach