The national park is administered by the South Downs National Park Authority (SDNPA). The SDNPA was established on 1 April 2010, and became fully functioning, including becoming the planning authority for the national park, on 1 April 2011. It is responsible for promoting the statutory purposes of the national park and the interests of the people who live and work within it. The statutory purposes of the SDNPA, as a national park authority, are specified by the Environment Act 1995; these are: