March 13, 2018 looms as an important date as new regulations regarding common property window openings come into play.
Quoting the department of fair trading:
To prevent children falling from windows, all strata buildings in NSW must be fitted with devices that enable the maximum window openings to be less than 12.5cm. Owners corporations must have devices installed on all applicable common property windows by 13 March 2018. The safety devices must be robust and childproof.
For all information, see the Department of Fair Trading page here.