AJP – YES you’re right – the implementation deadline for the installation of window safety devices by Owners Corporations is 13 March 2018.
A “safety device” must be fitted to any opening window where the sill is closer than 1.7m from the floor of a Lot, and where that floor is greater than 2m above the surface directly outside / below that window.
The “safety device” when fitted must childproof (e.g. lockable) and limit the maximum window opening to 12.5cm.
No doubt some enterprising suppliers will come-up with purpose built (or named) devices, but so far as I’m aware conventional window locks that permanently secure a window such that it’s 12.5cm open (rain?) and those externally mounted diamond-pattern safety (insect) screens also comply.