Norway: European Union membership
November 27, 1994
Ireland: Approval of Amsterdam Treaty (Eighteenth Amendment of the Constitution of Ireland)
May 22, 1998

Switzerland: Requiring Referendums to Start EU Negotiations

Choice

Votes

Percent

Against

1,189,440

74.1%

For

416,720

25.9%

Invalid votes

4,987

Blank votes

24,417

Total votes

1,635,564

100.00%

Registered voters and turnout

4,614,662

35.4%

Question: Do you want to accept the popular initiative ‘EU accession negotiations: the people decide!’?

Question (German): Wollen Sie die Volksinitiative ‘EU-Betrittsverhandlungen vors Volk!’ annehmen?

Question (French): Acceptez-vous l’initiative populaire “Négociations d’adhésion à l’UE: que le peuple décide!”?

Question (Italian): Volete accettare l’iniziativa popolare “Negoziati d’adesione all’UE: decida il popolo!”?

Source: Question (German): https://www.bk.admin.ch/bk/de/home/dokumentation/abstimmungsbuechlein.html; question (French): https://www.bk.admin.ch/bk/fr/home/documentation/compilation-explications-Conseil%20fédéral-depuis-1978.html; question (Italian): https://www.bk.admin.ch/bk/it/home/documentazione/raccolta-delle-spiegazioni-del-consiglio-federale-dal-1978.html.