This was the first time there was a legal requirement on immunity, as well as emissions on apparatus intended for the general population. Its scope covers all apparatus 'liable to cause electromagnetic disturbance or the performance of which is liable to be affected by such disturbance'.

One of these was the EMC Directive (89/336/EC) and it applies to all equipment placed on the market or taken into service.

In the mid 1980s, the European Union member states adopted a number of 'new approach' directives with the intention of standardizing technical requirements for products so that they do not become a barrier to trade within the EC.

Test methods and limits were based on CISPR publications, although similar limits were already enforced in parts of Europe. In 1979, legal limits were imposed on electromagnetic emissions from all digital equipment by the FCC in the US in response to the increased number of digital systems that were interfering with wired and radio communications. These have evolved over the decades and form the basis of much of the world's EMC regulations today. CISPR subsequently produced technical publications covering measurement and test techniques and recommended emission and immunity limits. In 1933, a meeting of the International Electrotechnical Commission (IEC) in Paris recommended the International Special Committee on Radio Interference ( CISPR) be set up to deal with the emerging problem of EMI. Since the earliest days of radio communications, the negative effects of interference from both intentional and unintentional transmissions have been felt and the need to manage the radio frequency spectrum became apparent. Interference by 5 GHz Wi-Fi seen on Doppler weather radar History

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