"While the building sector is not the largest contributor to GHG emissions, it is one of the
fastest growing sources. Energy used in buildings accounts for almost 20% of all energy
related GHG emissions."
(Source: http://www.abcb.gov.au/Resources/Publications/Education-Training/NCC-Volume-Two-Energy-Efficiency-Provisions)
"The NCC is given legal effect by relevant legislation in each State and Territory. This legislation prescribes or "calls up" the NCC to fulfill any technical requirements that are required to be satisfied when undertaking building work or plumbing and drainage installations.
Each State and Territory's legislation consists of an Act of Parliament and subordinate legislation which empowers the regulation of certain aspects of building work or plumbing and drainage installations, and contains the administrative provisions necessary to give effect to the legislation." (Source: http://www.abcb.gov.au/NCC/Regulatory-Framework)