Australian nationality law determines who is and who is not an Australian citizen. The status of Australian nationality or Australian citizenship was created by the Nationality and Citizenship Act 1948 (in 1973 renamed the Australian Citizenship Act 1948) which came into force on 26 January 1949. The 1948 Act was amended many times, notably in 1973, 1984, 1986 and 2002. The Australian Citizenship Act 2007 replaced the 1948 Act, commencing on 1 July 2007.