The Census in Australia, officially the Census of Population and Housing, is the national census in Australia that occurs every five years. The census collects key demographic, social and economic data from all people in Australia on census night, including overseas visitors and residents of Australian external territories, only excluding foreign diplomats. The census is the largest and most significant statistical event in Australia and is run by the Australian Bureau of Statistics (ABS). Every person must complete the census, although some personal questions are not compulsory. The penalty for failing to complete the census after being directed to by the Australian Statistician is one federal penalty unit, or . The "Australian Bureau of Statistics Act 1975" and "Census and Statistics Act 1905" authorise the ABS to collect, store, and share anonymised data.