War Measures Act The War Measures Act ( 5 George V , Chap . 2 ) was a statute of the Parliament of Canada that provided for the declaration of war , invasion , or insurrection , and the types of emergency measures that could thereby be taken . The act was brought into force three times in Canadian history : The Act was questioned for its suspension of civil liberties and personal freedoms , not only for Ukrainians and other Europeans during Canada ' s first national internment operations of 19141920 , but also during the Second World War ' s Japanese Canadian internment and in the October Crisis . First World War . In the First World War , a state of war with Germany was declared by the United Kingdom on behalf of the entire British Empire . Canada was notified by telegraphic despatch accordingly , effective 4 August 1914 , and that status remained in effect until 10 January 1920 . The " War Measures Act , 1914 " was subsequently adopted on 22 August 1914 to ratify all steps taken by Canada from the declaration of war , to continue until the war was over . Sections 2 to 6 of the original Act in particular provided for the following : Internment during World War I and afterwards . Canada ' s first national internment operations of 1914 - 1920 involved the internment of both genuine POWs and thousands of civilians , most of them Ukrainians who had come from western Ukrainian lands ( Galicia and Bukovyna ) then held by the Austro - Hungarian Empire . Branded as " enemy aliens , " they were stripped of what little wealth they had , forced to work for the profit of their jailers and subjected to other state sanctioned censures , including disenfranchisement under the " Wartime Elections Act " . A campaign begun by the Ukrainian Canadian Civil Liberties Association in 1985 aimed at securing official acknowledgement and symbolic restitution for what happened succeeded in 2005 , following passage of the " Internment of Persons of Ukrainian Origin Recognition Act " , which resulted in the establishment of the Canadian First World War Internment Recognition Fund . With the advent of the Russian Revolution in 1917 , additional regulations and orders were added to make the membership in a number of organizations , including socialist and communist organizations , forbidden . Immigration from nations that were connected directly or indirectly with the Austro - Hungarian Empire and Germany was stopped and natives of these countries ( Austria , Hungary , Germany and Ukraine ) were classed as enemy aliens under the War Measures Act . These enemy aliens were required to carry identification with them at all times and forbidden from possessing firearms , leaving the country without permission , or publishing or reading anything in a language other than English or French . Thousands of these enemy aliens were also interned in camps or deported from Canada . It was not until the labour shortage in Canada became dire that these interned individuals were released into the workforce again in an attempt to boost the economy and the war effort . Second World War . In contrast to the previous war , by virtue of the " Statute of Westminster 1931 " , Canada instituted its measures separately from the United Kingdom . A state of apprehended war was declared on 25 August 1939 , and the " Defence of Canada Regulations " were implemented under the " War Measures Act " . A state of war was declared with Germany on 10 September 1939 . The extreme security measures permitted by the " Defence of Canada Regulations " included the waiving of habeas corpus and the right to trial , internment , bans on political and religious groups , restrictions of free speech including the banning of certain publications , and the confiscation of property . Section 21 of the Defence of Canada Regulations allowed the Minister of Justice to detain without charge anyone who might act " in any manner prejudicial to the public safety or the safety of the state . " The government soon interned fascists and Communists as well as opponents of conscription . The regulations were later used to intern Japanese Canadians on a large scale as well as some German and Italian Canadians who were viewed as enemy aliens . In 1940 , the more complex nature of organizing the war effort required the " National Resources Mobilization Act " to be adopted as well , and many subsequent regulations were brought into force by virtue of both of these Acts . In 1943 , the Supreme Court of Canada , in the " Chemicals Reference " , ruled that Orders in Council made under the Act were equivalent to an Act of Parliament , as Rinfret J observed : This authority was cited later in support of decisions taken in the " Reference re Persons of Japanese Race " . The Act ' s effect was further clarified in the " Wartime Leasehold Regulations Reference " , which held that regulations instituting rental and housing controls displaced provincial jurisdiction for the duration of the emergency . As Taschereau J ( as he then was ) noted : The Act was in force until 31 December 1945 , after which the " National Emergency Transitional Powers Act , 1945 " was in force until 31 March 1947 . In 1947 , the " Continuation of Transitional Measures Act , 1947 " was enacted , maintaining certain wartime orders and regulations , and stayed in place until 30 April 1951 . Treatment of Japanese Canadians . The attack on Pearl Harbour in 1941 led to Canada declaring war against Japan on 8 December 1941 . An already established racial bias towards Japanese - Canadians was transformed into full anti - Japanese thoughts and behaviour by Canadian citizens , who saw Japanese - Canadians as spies for Japan . This fear towards Japanese - Canadians led to their rights slowly being taken away : In December 1945 , three Orders in Council were issued to provide for the expulsion of Japanese nationals and other persons of Japanese origin , whether or not they were British subjects ( either natural born or naturalized ) . Although the Supreme Court of Canada gave a mixed ruling on the matter , the Judicial Committee of the Privy Council declared all of them to be valid . Following various protests among politicians and academics , the orders were revoked in 1947 . Control of the wartime economy . At the beginning of the war , the Wartime Prices and Trade Board was created with a wide mandate to regulate all matters dealing with the necessities of life , rental and housing controls , import and export controls , and wage and price controls . In 1942 , its responsibilities were expanded to include the reduction of non - essential industrial activities in order to maintain minimum requirements only for civilian goods . The Act was also used to create the " Wartime Labour Relations Regulations " in order to control strikes and lockouts and keep wartime production going . While the regulations were initially restricted to industries under federal jurisdictions and companies directly involved in the war effort , provision was made for the provinces to co - opt into the scheme ( which all eventually did ) . As labour unrest was widespread at the time , a system of compulsory conciliation was brought into effect , and no strike or lockout could occur until : There was , however , frustration on the part of the unions which felt that the government tended to not care about the issues the unions were trying to bring to light . The regulations continued after the war ' s end until 1948 , where they were replaced by similar legislation at both the federal and provincial levels . Postwar history . In 1960 , the Act was amended by the " Canadian Bill of Rights " , in order to ensure that : The October Crisis . In 1970 , members of the FLQ kidnapped British diplomat James Cross and Quebec provincial cabinet minister Pierre Laporte , the latter of whom was later murdered . What is now referred to as the October Crisis raised fears in Canada of a militant terrorist faction rising up against the government . Under provisions of the " National Defence Act " , the Canadian Forces had been called to assist the police . They appeared on the streets of Ottawa on 12 October 1970 . Upon request of the Quebec government with unanimous consent of all party leaders in the Quebec National Assembly , troops appeared on the streets of Montreal on 15 October . At the request of the Mayor of Montreal , Jean Drapeau , and the Quebec provincial government , and in response to general threats and demands made by the FLQ , the federal government declared a state of apprehended insurrection under the Act on 16 October 1970 . This was done so that police had more power in arrest and detention , in order to find and stop the FLQ members . The use of the " War Measures Act " to address the problem presented by the FLQ was well supported by Canadians in all regions of Canada . However , there were many vocal critics of the Government action , including New Democratic Party leader Tommy Douglas , who said , " The government , I submit , is using a sledgehammer to crack a peanut . " While the War Measures Act was in force , 465 people were arrested and held without charge . The response by the federal and provincial governments to the incident still sparks controversy . There was a large amount of concern about the Act being used , as it was a considered to be a direct threat to civil liberties , removing rights such as " habeas corpus " from all Canadians . This is the only time that the " War Measures Act " had been put in place during peacetime in Canada . Critics , such as Laurier LaPierre , accused Prime Minister Pierre Trudeau ' s move to suspend " habeas corpus " as more of a reaction to the separatist movement in Quebec by criminalizing it . The Act ' s 1970 regulations were replaced by the " Public Order ( Temporary Measures ) Act " in November 1970 , which subsequently expired on 30 April 1971 . Replacement . In May 1981 , the " Emergency Planning Order " was passed , which assigned responsibilities for planning to meet the exigencies of different types of emergencies to various Ministers , departments and agencies of government . In 1988 , the " Emergencies Act " was passed , and the " War Measures Act " was repealed as a consequence .