• Austria
• ​Belgium
• Bulgaria
• Czech Republic
• Cyprus
• Denmark
• Estonia
• Finland
• France
• Germany
• Great Britain and Northern Ireland
• Greece
• Hungary
• Ireland
• Iceland
• Italy
• Latvia
• Liechtenstein
• Lithuania
• Luxembourg
• Malta
• The Netherlands
• Norway
• Poland
• Portugal
• Romania
• Slovakia
• Slovenia
• Spain
• Sweden

Switzerland is also covered by the rules on the co-ordination of social security.