The Resource Management Act (RMA) is New Zealand's main piece of environmental law. The purpose of the RMA is to promote the sustainable management of New Zealand's natural and physical resources. The RMA enables people and communities to provide for their social, economic and cultural wellbeing, their health and safety. Regional, district and city councils all have specific functions under the RMA, including setting policies, rules, and other methods, in plans to sustain the potential of New Zealand's natural and physical resources for future generations.