CENELEC is working closely with its international counterpart, the International Electrical Commission (IEC). In order to facilitate a consensus process between European and international standardisation activities in the electricity sector, CENELEC and IEC formalized the framework of their cooperation by signing a “joint programming agreement for new work and parallel votes” in 1996, known as the Dresden Agreement. Nevertheless, the Vienna agreement allows the CEN or ISO to carry out standardisation activities on the same subject if deemed necessary. The Joint ISO-CEN Coordinating Group of the Technical Boards plays an important strategic role in monitoring the implementation of the Viennese Agreement and consulting with the CEN`s Senior Technical Committee and the ISO Technical Technical Committee on all matters related to the Viennese Agreement, including the need for revisions. In September 2001, a revised version (version 3.3) of the “Vienna” agreement was published, which reduced the agreement itself to the essential principles of cooperation between ISO and the NEC. Overall, the current version of international standardization gives priority and gives more importance to ISO leadership than previous versions. For example, ISO standards can only be revised under ISO`s direction, regardless of their origin.