There exist three main routes for stakeholders and interested parties to participate in the development of European Standards:
- Through the International Organization for Standardization (ISO)
- Through the International Electrotechnical Commission (IEC)
CEN collaborates with the 'International Organization for Standardization' - ISO (according to the terms of the Vienna Agreement), while CENELEC works closely with the 'International Electrotechnical Commission' - IEC (Frankfurter Agreement). At the same time, all of CEN and CENELEC’s national members are also members of either ISO or IEC. These relationships help to ensure that the interests of European businesses and other stakeholders are also taken into account at international level.