The Director of National Parks is a corporation solely established under the Environment Protection and Biodiversity Conservation Act 1999, with the principal function of managing the Commonwealth reserves that are established under the Act. The Director is assisted in performing this function by the staff of Parks Australia (a division of the Department of Sustainability, Environment, Water, Population and Communities). The Director of National Parks has also delegated management of marine reserves to the Marine Division and the Austrarlian Antarctic Division within the Department.