Electoral and Referendum Amendment Act 1998, which became law on 17 July 1998. Section 240 was amended by the same Act to specify that using repeated numbers invalidated a vote. References External links Neither List archives Archived 1998 discussion group Australia: Political Activist Becomes First Prisoner of Conscience for Over 20 Years Albert Langer: Australia's First Political Prisoner? May Day it's the festival of the distressed 'Tweedledum and Tweedledee 1,2,3,3' – The Albert Langer Story Australian Parliament's Current Issues Brief No. 14 1995–96 Amnesty International prisoners of conscience held by Australia Activists from Melbourne Australian communists Australian Jews Living people Year of birth missing (living people) Censorship in Australia Australian prisoners and detainees Prisoners and detainees of the Commonwealth of Australia Anti-Zionism in Australia Maoists History and use of electoral systems Dissidents