Australian Communist Party v Commonwealth
Australian Communist Party v The Commonwealth, also known as the Communist Party Case, was a legal case in the High Court of Australia in 1951 in which the court declared the Communist Party Dissolution Act 1950 unconstitutional and invalid as being beyond the power of the Parliament. Notable Australian academic George Winterton described the case as "undoubtedly one of the High Court's most important decisions".<ref name="Winterton">{{cite web|first=George |last=Winterton |author-link=George Winterton |url=http://www.austlii.edu.au/au/journals/MelbULawRw/1992/6.pdf |title=The Significance of the Communist Party case}} (1992) 18 Melbourne University Law Review 630.</ref>

 Background 
In the general election held on 10 December 1949, Prime Minister Robert Menzies led a Liberal-Country Party coalition to government pledged to dissolving the Communist Party of Australia. The party had been banned before: following the Molotov–Ribbentrop Pact, the party had opposed Australian involvement in the Second World War in 1939, which gave Menzies' United Australia Party-Country Party government the opportunity to dissolve it on 15 June 1940 under the National Security (Subversive Associations) Regulations 1940 (Cth) relying on the defence power of the Constitution of Australia. These regulations were invalidated by the High Court in the Jehovah's Witnesses case (Adelaide Company of Jehovah's Witnesses Inc v Commonwealth (1943) 67 CLR 116.) Before that, the ban on the Communist Party (now supporting the war after the invasion of the Soviet Union) was lifted by the Curtin government in December 1942. The Communist Party Dissolution Bill was brought into the House of Representatives by Prime Minister Menzies on 27 April 1950. The Bill began with a long preamble with nine 'recitals', which:
"(a) cited the three powers principally relied upon: section 51(vi) of the Constitution (the defence power), section 51(xxxix) (the express incidental power), and section 61 (the executive power);
"(b) summarised the case against the Communist Party by reference to its objectives and activities: it was said to engage in activities designed, in accordance with 'the basic theory of communism, as expounded by Marx and Lenin', to create a 'revolutionary situation' enabling it 'to seize power and establish a dictatorship of the proletariat.' To this end, it engaged in 'activities ... designed to ... overthrow ... the established system of government in Australia and the attainment of economic, industrial or political ends by force, ... intimidation or [fraud]', especially espionage, sabotage, treason or subversion, and promoted strikes to disrupt production in industries vital to Australia's security and defence, including coal-mining, steel, engineering, building, transport and power; and
"(c) asserted that the measures taken by the Bill were necessary for Australia's defence and security and the execution and maintenance of its Constitution and laws, thereby tying the Bill's operative provisions to the powers cited in (a)." The Bill went on to (1) declare unlawful the Australian Communist Party, confiscating without compensation the property of the party; (2) deal with "affiliated organizations" (including any attempt to reconstitute the party) by purporting to empower the Governor-General (in effect, the Executive) to declare unlawful affiliated bodies if satisfied that their existence was prejudicial to security and defence which resulted in dissolution and seizure of its property; evidence supporting a declaration had to be considered (not necessarily accepted as proof) by a committee of Government appointees and affected organisations could only gain relief by proving to a Court that they were not an affiliate but were unable to challenge security declarations; further, it created an offence for a person knowingly to be an officer or member of an unlawful association and liable to 5 years imprisonment; and (3) persons could be declared to be a communist or Party officer or member and to be engaged, or 'likely to engage', in activities prejudicial to the security and defence of Australia: such declared persons could not be employed by the Commonwealth or a Commonwealth authority, nor could they hold office in a union in an industry declared by the governor-general to be 'vital to the security and defence of Australia.' The Bill was subjected to vigorous debate. In the House of Representatives, the Government accepted some Opposition amendments but rejected the Opposition-controlled
Senate amendments. A re-drafted Communist Party Dissolution Bill [No. 2] was introduced by Menzies on Thursday, 28 September 1950. In his second reading speech, Menzies threatened a double dissolution of Parliament if the Senate again rejected the measure. The Labor Party Opposition allowed it passage through the Senate on 19 October 1950 and the Government wasted no time in gaining royal assent and making the Act operative the following day. On the day the Act became law, summonses were issued out of the High Court challenging the validity of the Act. The actions named as respondents:
 the Commonwealth of Australia;
 Robert Gordon Menzies, the prime minister of the said Commonwealth for the time being;
 John Armstrong Spicer, Attorney-General of the said Commonwealth for the time being;
 William John McKell, the governor-general of the Commonwealth;
 and Arnold Victor Richardson the receiver of the property of the Communist Party. The various plaintiffs were:
the Communist Party of Australia,
Ralph Siward Gibson and Ernest William Campbell (editor, Tribune), who sued on behalf of and for the benefit of all the members of the Australia Communist Party;
the Waterside Workers' Federation of Australia and its general secretary, James Healy;
the Australian Railways Union and its general secretary, John Joseph Brown;
Edwin William Bulmer (who sued for the Building Workers' Industrial Union which was deregistered at the time) and Frank Purse;
the Amalgamated Engineering Union, Australian Section, and Edward John Rowe, a member of the Commonwealth Council of the AEU;
Seamen's Union of Australia and its general secretary, Eliot Valens Elliott;
the Federated Ironworkers' Association of Australia and its national secretary, Leslie John McPhillips; and
the Australian Coal and Shale Employees' Federation and its general president Idris Williams. These plaintiffs were later joined by a group of intervenors:
the Federated Ship Painters and Dockers Union;
Sheet Metal Workers' Union;
Federated Clerks' Union of Australia (New South Wales Branch) and its secretary, Maurice John Rodwell Hughes. The matter was sent to Justice Dixon who stated a case for the full court to consider. When the High Court assembled to hear the matter, the bar table was crowded with the leading names of the Sydney and Melbourne Bars. For the Commonwealth and other respondents: Garfield Barwick KC, Alan Taylor KC, Victor Windeyer KC, Stanley Lewis KC, Richard Ashburner, Bernard Riley, Murray McInerney, Cliff Menhennitt, George Lush and Bruce MacFarlan. The Communist Party and its officers and members were represented by Fred Paterson, Ted Laurie, Ted Hill and Max Julius. The unions were represented by various combinations of counsel: H V Evatt KC, Gregory Gowans KC, Simon Isaacs KC, G T A Sullivan, Claude Weston KC, C M Collins and Maurice Ashkanasy KC. The case began argument on Tuesday, 14 November 1950 and continued through a total of 24 sitting days in Sydney concluding submissions on Tuesday, 19 December 1950. The Court reserved its decision which was delivered in Melbourne on Friday, 9 March 1951. Decision 

Six of the justices ruled that the act was invalid, over the sole dissent of the Chief Justice John Latham. All seven judges accepted that the Commonwealth had legislative power to deal with subversion (although they differed as to the precise location of such a power) and that it had validly done so in the Crimes Act 1914 (Cth). Unlike the challenged law, the sedition provisions left questions of guilt to the courts to determine through criminal trials. However, the Communist Party Dissolution Act 1950 (Cth) had simply declared the party guilty and had authorised the executive government to 'declare' individuals or groups of individuals. The validity of the law depended on the existence of a fact (a constitutional fact) which the law asserted to be a fact whether or not there actually was any factual connection between those bodies or persons and subversion. In the metaphor used by Fullagar J, "a stream cannot rise higher than its source". "The validity of a law or of an administrative act done under a law cannot be made to depend on the opinion of the law-maker, or the person who is to do the act, that the law or the consequence of the act is within the constitutional power upon which the law in question itself depends for its validity. A power to make laws with respect to lighthouses does not authorize the making of a law with respect to anything which is, in the opinion of the law-maker, a lighthouse. A power to make a proclamation carrying legal consequences with respect to a lighthouse is one thing: a power to make a similar proclamation with respect to anything which in the opinion of the Governor-General is a lighthouse is another thing.". This reasoning is predicated on the notion of judicial review, sometimes referred to as the principle in Marbury v Madison in recognition of its origins in the federal system of the United States of America. In performing the function of judicial review, the judges insist that their role is judicial and not political. In a well-known passage, Justice Wilfred Fullagar expressed this by stating,

Latham's dissent
Latham, the sole dissenter, found the act to be a valid exercise of the federal parliament's defence power. His opinion sought to uphold parliamentary supremacy, on the grounds that the exercise of the defence power was inherently a matter for political rather than judicial judgment. He was the only member of the court who had previously served as a government minister. Andrew Lynch included Latham's dissent in his compilation Great Australian Dissents, with a chapter authored by George Williams. Lynch described it as "probably the most controversial inclusion" and Williams stated that it had been "eclipsed by the brilliance of the majority position". Justice Ian Callinan extensively quoted Latham in his opinion in Thomas v Mowbray (2007), relating to anti-terrorism laws. Aftermath
Later in the year, at the 1951 referendum, Menzies sought to amend the Constitution to permit the parliament to make laws in respect of Communists and Communism where this was necessary for the security of the Commonwealth. If passed, this would have given a government the power to introduce a bill proposing to ban the Communist Party (although whether it would have passed the Senate is an open question). However, the Opposition leader Dr. H. V. Evatt campaigned strongly on civil liberties grounds, and the proposal was narrowly defeated. Further reading 
 Greenwell J 2011, The Prelude to Petrov, Clio History Journal. (1999) 25 Monash University Law Review 257. Winterton, G. "Dissolving the Communists: The Communist Party Case and its Significance" in Seeing Red: The Communist Party Dissolution Act and Referendum 1951: Lessons for Constitutional Reform (1992) Evatt Foundation
Winterton, G. "The Communist Party Case" in H. Lee and G. Winterton (eds) Constitution of Australia: Landmarks (2003) Cambridge University Press, at 108–144
Zines, L. "'The Stream Cannot Rise Above its Source' – The Doctrine in the Communist Party Case" in his The High Court and the Constitution'' (1997) Butterworths

Notes

1951 in Australian law
1951 in case law
Anti-communism in Australia
Rights in the Australian Constitution cases
Communism in Australia
Defence power in the Australian Constitution cases
Freedom of association
High Court of Australia cases