Breakaway Brake systems

Hi all
While investigating my caravan I came upon this bit of news.
All vehiclesregistered in NSW towing a van with breakaway brakes must have a warning light in the vehicle to advise the driver if the van brake battery is failing. Remote monitors are available but how many caravanners would have this monitor. Most new vans are already registered when you pick them up and the caravan yard gets the van registered without using a vehicle with the warning monitor because they are not going to be the normal towing vehicle.
For a monitor to be fitted you would need a van plug with an extra pin to pass the information to the driver, so all vans with breakaway brakes should have a twelve pin plug or an Anderson plug to allow one of the seven pins on a normal plug to be used.
When a caravan is over two tonne it must be inspected the first time at a heavy vehicle inspection station where this rule applies but after that it can be check at a normal vehicle rego checking station which uses another set of rules.

Does this rule apply to Qld? How can I check to see if my Tekonsha breakaway unit is powered after a breakaway?

Cheers Jack