Number of offices to achieve minimum NABERS ratings

NABERS explained
NABERS is a national rating system that measures the environmental performance of Australian buildings, tenancies and homes. It measures energy efficiency, water usage, waste management and indoor environment quality.
Government Resource Efficiency Policy targets
E2 Minimum NABERS energy ratings for offices and data centres
Owned and leased office buildings greater than 2000 square metres will achieve and maintain a NABERS energy rating of at least 4.5 stars by June 2018.
All data centres will achieve a minimum infrastructure and IT equipment NABERS energy rating of 4.5 stars by June 2018.
W2 Minimum NABERS water ratings for office buildings
All new and refurbished owned office buildings and leased office buildings with a net lettable area of over 2000 square metres will achieve a whole building NABERS water rating of 4 stars where cost-effective.