Legal tender
The Swiss franc is also the currency used for administrative and accounting purposes by most of the numerous international organisations that are headquartered in Switzerland.
European integration
The European Economic Area (EEA) agreement allows Norway, Iceland and Liechtenstein to participate in the European Single Market without joining the EU. The four basic freedoms apply. However, some restrictions on fisheries and agriculture take place. Switzerland is linked to the European Union by Swiss-EU bilateral agreements, with a different content from that of the EEA agreement.
The Eurozone refers to the European Union member states that have adopted the euro currency union as the third stage of the European Economic and Monetary Union (EMU). Further, certain states outside the EU have adopted the euro as their currency, despite not belonging to the EMU. Thus, a total of 25 states, including 19 European Union states and six non-EU members, currently use the euro.