Contracting countries
| Nr. | Code | Contracting country | Official Language |
| 1 | AT | Austria | German |
| 2 | BE | Belgium | German, French, Dutch |
| 3 | BG | Bulgaria | Bulgarian |
| 4 | CH/LI | Switzerland/ Liechtenstein | German, French, Italian |
| 5 | CY | Cyprus | Greek, Turkish |
| 6 | CZ | Czech Republic | Czech |
| 7 | DE | Germany | German |
| 8 | DK | Denmark | Danish |
| 9 | EE | Estonia | Estonian |
| 10 | ES | Spain | Spanish |
| 11 | FI | Finland | Finnish |
| 12 | FR | France | French |
| 13 | GB | United Kingdom | English |
| 14 | GR | Greece | Greek |
| 15 | HU | Hungary | Hungarian |
| 16 | IE | Ireland | English |
| 17 | IS | Iceland | Icelandic |
| 18 | IT | Italy | Italian |
| 19 | LT | Lithuania | Lithuanian |
| 20 | LU | Luxembourg | German, English, French |
| 21 | LV | Latvia | Latvian |
| 22 | MC | Monaco | German, English, French |
| 23 | NL | The Netherlands | Dutch |
| 24 | PL | Poland | Polish |
| 25 | PT | Portugal | Portuguese |
| 26 | RO | Rumania | Rumanian |
| 27 | SE | Sweden | Swedish |
| 28 | SI | Slovenia | Slovenian |
| 29 | SK | Slovakia | Slovak |
| 30 | TR | Turkey | Turkish |
Extension State
| Nr. | Code | Extension State | Official Language |
| 1 | AL | Albania | Albanian |
| 2 | BA | Bosnia-Herzegovina | Bosnian, Serbian, Croatian |
| 3 | HR | Croatia | Croatian |
| 4 | MK | Macedonia | Macedonian |
| 5 | YU | Serbia | Serbian |