What are the specific NCC requirements for fire separation between attached dwellings in Australia?

The National Construction Code (NCC) 2022 Volume Two, specifically Section H3D3, mandates that attached dwellings (Class 1a buildings) must be separated by a fire-resisting wall achieving a minimum Fire Resistance Level (FRL) of 60/60/60 for loadbearing elements and 60/60/30 for non-loadbearing elements, extending continuously from the footings to the underside of the roof covering. This critical fire separation ensures occupant safety and limits fire spread between residences by requiring appropriate construction materials and fire stopping for any penetrations, thereby maintaining compartmentation and structural integrity under fire conditions.