Referendums have been held in Australia to approve parliament-proposed changes to the Constitution of Australia or to the constitutions of states and territories. Polls conducted on non-constitutional issues are sometimes but not always referred to as plebiscites. Not all federal referendums have been on constitutional matters (such as the 1916 Australian conscription referendum), and state votes that likewise do not affect the constitution are frequently said to be referendums (such as the 2009 Western Australian daylight saving referendum). Historically, they are used by Australians interchangeably and a plebiscite was considered another name for a referendum.