Five referendums were held in Switzerland during 2005. The first two were held on 5 June on Switzerland joining the Schengen Area and whether registered partnerships for same-sex couples should be introduced. Both questions were approved. The third was held on 25 September on a federal resolution on extending the agreement on free movement of people to new members of the European Union, and was also approved. The final two were held on 27 November on a popular initiative "for food from an agriculture free of genetic modification" and on a labour law related to the opening times of shops in public transport hubs. Both were approved.
In a 1992 referendum Swiss voters rejected membership of the European Economic Area, which had been seen as a stepping stone on the way to membership of the European Union (EU). Polls consistently showed that the Swiss did not want to join the European Union, which was confirmed in a 2001 referendum where over 75% voted against membership. The traditional Swiss policy of avoiding foreign entanglements was also shown by it not joining the United Nations until 2002. Business and political leaders in Switzerland however were concerned over Switzerland being isolated so the Swiss government pursued a policy of bilateral agreements with the European Union. The EU required Switzerland to join the Schengen Agreement in order that other areas of the relationship, such as trade agreements, could continue.
In the referendum the Swiss were asked to decide whether Switzerland should become part of the Schengen and Dublin agreements. If the Schengen agreement was accepted then Switzerland would have to open their borders and end any systematic checks on identity at the borders by 2007. Switzerland would become part of a passport free zone, however customs controls would remain as Switzerland was not a member of the European Union. The agreements would also mean that Switzerland and the European Union would share information on crime and asylum applications. The Dublin agreement would let Switzerland turn away any asylum applicants who had already claimed asylum in another signatory of the agreements. The Swiss government estimated that this would reduce applications by about 20%.