Complying with today’s widening range of regulations is an unavoidable part of building in contemporary Australia.
The National Construction Code (NCC) is produced and maintained by the Australian Building Codes Board (ABCB) on behalf of the Australian Government and each State and Territory Government.
Under the NCC, the Building Code of Australia (BCA) is a uniform set of technical provisions for the design and construction of buildings and other structures throughout Australia. It allows for variations in climate and geological or geographic conditions.
These regulations give a minimum quality of product and service to give you protection within the construction or addition of a dwelling. These include regulations for wind loads, site conditions, thermal comfort, energy values, Bushfire attack levels, material and installation requirements.
A more detailed explanation is provided here by the Australian Window Association.