PNG has adopted building codes based on those of Australia, mainly to increase buildings’ safety. As of May 1, 2009, Australia enacted the 2009 Building Code of Australia (BCA), which covers structure, fire resistance, services, equipment, energy efficiency, and certain aspects of health and amenities. The energy efficiency requirements for the BCA concentrate on the building envelope and insulation, broader systems including lighting, heating, ventilating, and air conditioning (HVAC), water heating, metering, and overall building performance, operation, and maintenance.