All residential strata buildings in NSW must have window safety devices installed to prevent children falling from windows. The deadline is 13th March 2018. The regulation applies to windows that can be opened and are less than 1.7m above the internal floor, where the internal floor is more than 2m above the outside ground. The devices must enable the maximum opening to be less than 12.5cm A device that allows for a window to be fully opened or limited to less than 12.5cm is compliant. Complying safety devices include devices attached to a window frame or robust bars. The devices must also be installed on applicable windows in common access areas such as stair landings. Read more.