The Water Efficiency Labelling and Standards (WELS) Scheme is a cooperative Commonwealth/state and territory regulatory system established as a cost effective mechanism to help encourage and improve efficiency in domestic water use. WELS has its own Act, The Water Efficiency Labelling and Standards Act 2005 and is underpinned by its own Australian Standard, the AS/NZS 6400. Under the scheme, product suppliers are required to label clothes washers, dishwashers, showers, taps, toilets, urinals and (currently optional) flow controllers with water efficiency information and star-ratings to enable consumers to choose the most water efficient product for their needs. Suppliers must register these products before offering them for supply with the WELS Regulator (the First Assistant Secretary of the Environment Quality Division in Department of Sustainability, Environment, Water, Population and Communities).