Artikel 2

2.1. Countries that are members of the Economic Commission for Europe (UN/ECE), regional economic integration organizations that are set up by ECE member countries and countries that are admitted to the ECE in a consultative capacity in accordance with paragraph 8 of the ECE's Terms of Reference, may become Contracting Parties to this Agreement.
2.2. Countries that are members of the United Nations and that participate in certain activities of the ECE in accordance with paragraph 11 of the ECE's Terms of Reference, and regional economic integration organizations set up by such countries, may become Contracting Parties to this Agreement.
2.3. Any specialized agency and any organization, including intergovernmental organizations and non-governmental organizations, that have been granted consultative status by the Economic and Social Council of the United Nations, may participate in that capacity in the deliberations of any Working Party during consideration of any matter of particular concern to that agency or organization.