The 1958 agreement is an agreement reached within the framework of the EEC-UN to establish uniform standards for vehicles and their components with respect to safety, environment, energy and flight requirements. The title of the agreement reads: “Agreement on the adoption of uniform technical rules for wheeled vehicles, equipment and parts that can be mounted and/or used on wheeled vehicles and the conditions for mutual recognition of permits issued on the basis of these provisions.” The agreement aims to promote the harmonization of regulations and mutual recognition of authorisations between the contracting parties to the agreement. (For more details, see WP.29`s terms and conditions on page 32 of WP.29 “WP.29 How it Works – How It Can Join” here:www.unece.com.in org/trans/main/wp29wgs/wp29wgs/wp29gen/wp29pub.htmlThe agreement in its original form allowed only members of the EEC-EU to participate. The previous title was “Agreement on uniform registration conditions and mutual recognition of the registration of automotive equipment and parts concluded in Geneva on 20 March 1958” Among the first signatories of the 1958 include Italy (28 March), the Netherlands (30 March), Germany (19 June), France (26), Hungary (30 June), Sweden and Belgium. Initially, the agreement only allowed the participation of the ECEC member countries, but in 1995 the agreement was revised to allow the participation of non-MEMBERS of the ERC. Current participants include the European Union and its member countries, as well as non-EEC-UN countries such as Norway, Russia, Ukraine, Croatia, Serbia, Belarus, Kazakhstan, Turkey, Azerbaijan and Tunisia, and even remote regions such as South Africa, Australia, New Zealand, Japan, South Korea, Thailand and Malaysia. A contracting party to the 1998 agreement may accept any UN GTR that interests it. A party that votes in favour of the creation of a United Nations GTR is required to submit the technical regulation by its government to the procedure for adopting such a technical regulation in its own legislation. However, it is free not to adopt this UN decision and to justify the decision under this procedure.
For more information, see Article 7 of the 1998 Agreement: www.unece.org/trans/main/wp29/wp29wgs/wp29gen/wp29glob.htmlA contracting party may also decide to accept products corresponding to a UN CSR, without including as much in their own laws or regulations. (i.e., the UN-GTR can take the form of a national regulatory option). From 2016[update], the participants in the 1958 agreement were with their UN country code: Most countries, even if they did not formally participate in the 1958 agreement, recognize the provisions of the United Nations and either reflect the content of UN rules in their own national requirements, or they authorize the importation, registration and use of GENEH or both vehicles. The two main exceptions are the United States and Canada (excluding lighting requirements); UN regulations are generally not recognized and UN compliant vehicles and equipment are not permitted for importation, sale or use in both regions unless they are considered to be in compliance with regional vehicle safety legislation or restricted non-traffic (e.g. B car show screens).  A party to the 1958 agreement may sign the UN regulations that interest it, but it is not an obligation.