Most countries, even if they do not formally participate in the 1958 agreement, recognize the provisions of the United Nations and reflect the content of UN regulations in their own national requirements, or authorize the importation, registration and use of UN vehicles or both. 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).  The first signatories to the 1958 agreement include Italy (28 March), the Netherlands (30 March), Germany (19), 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. The 1998 agreement on the establishment of global technical rules for wheeled vehicles, equipment and parts that can be mounted and/or used on wheeled vehicles is a subsequent agreement. Following its mission to harmonize vehicle regulations, the EEC-UN resolved the main problems (administrative provisions relating to type reception against self-certification and mutual recognition of receptions) that prevented countries not signatories to the 1958 agreement from participating fully in their activities. From 2016[update], the participants in the 1958 agreement were with their UN country code: This work has a de facto impact on vehicle design and facilitates international trade. The core of the Forum`s work is based on the “1958 Agreement” officially titled “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 requirements” (E/ECE/TRANS/505/Rev.2, amended on 16 October 1995). It will be a legal framework in which participating countries (contracting parties) agree on a common set of technical requirements and protocols for the reception of vehicles and components. These were previously referred to as “EEC-UN regulations” or, less formally, “EEC regulations” with regard to the Economic Commission for Europe. However, since many non-European countries are now parties to the 1958 agreement, the regulations officially refer to them as “UN regulations”.
  In accordance with the principle of mutual recognition set out in the agreement, the type receptions of each party are recognized by all other contracting parties. At present, it is not possible to design a single model of car that fully complies with the requirements of the United Nations and the United States, but it will be easier to develop the technology and both rules.