The following Contracting Parties are officially listed by the World Forum as applying this regulation. Nonetheless, this designation does not necessarily mean that a given Contracting Party either issues its own type approvals or accepts type approvals issued by other parties as there are exceptions.
| Contracting Party | Effective Date | ||
|---|---|---|---|
| Germany | 26 September 1993 | ||
| France | 28 June 1996 | ||
| Italy | 21 August 1988 | ||
| Austria | 17 August 1996 | ||
| European Union | 24 March 1998 | ||
| Japan | 01 April 2007 | ||
| Belarus | 01 September 2003 | ||
| Belgium | 15 May 1987 | ||
| Bosnia and Herzegovina | 06 March 1992 | ||
| Bulgaria | 01 January 2007 | ||
| Croatia | 08 October 1991 | ||
| Cyprus | 01 May 2004 | ||
| Czech Republic | 09 June 1996 | ||
| Denmark | 06 August 1990 |
In accordance with Regulation No. 70, paragraph 12, the Government of Denmark requires a specific length of 1,400 mm. |
|
| Estonia | 23 December 1997 | ||
| Finland | 19 April 1994 | ||
| Russian Federation | 08 April 1996 | ||
| Poland | 22 July 2000 | ||
| United Kingdom of Great Britain and Northern Ireland | 20 March 1990 | ||
| North Macedonia | 17 September 1991 | ||
| Greece | 24 March 1998 | ||
| Hungary | 07 September 1997 | ||
| Ireland | 24 March 1998 | ||
| Latvia | 18 January 1999 | ||
| Lithuania | 29 March 2002 | ||
| Ukraine | 08 October 2002 | ||
| Luxembourg | 26 November 1996 | ||
| Malaysia | 04 April 2006 | ||
| Turkey | 28 December 1998 | ||
| Netherlands | 15 May 1987 | ||
| Switzerland | 02 February 1996 | ||
| Malta | 01 May 2004 | ||
| Norway | 07 March 1999 | ||
| Montenegro | 03 June 2006 | ||
| Serbia | 27 April 1992 | ||
| Sweden | 11 November 1988 | ||
| Portugal | 24 March 1998 | ||
| Romania | 06 May 1996 | ||
| Slovak Republic | 14 January 1997 | ||
| Slovenia | 18 August 1990 | ||
| Spain | 24 March 1998 | ||
| Albania | 05 November 2011 | ||
| Egypt | 03 February 2013 | ||
| Republic of Moldova | 20 November 2016 | ||
| San Marino | 26 January 2016 | ||
| Georgia | 25 May 2015 | ||
| Nigeria | 17 December 2018 | ||
| Republic of Armenia | 30 April 2018 | ||
| Philippines | 03 November 2022 | ||
| Republic of Uganda | 23 August 2022 | ||
| Kyrgyz Republic | 31 October 2023 | ||
| Socialist Republic of Viet Nam | 24 September 2023 | ||
| Islamic Republic of Pakistan | 24 April 2020 |