Are representatives of the national electrotechnology communities. There is only one MB per country.

Operate national certification or approval scheme(s) for electrotechnical equipment and components in countries that have a member body of the IECEE.

Perform the test programmes and issue test reports (TRs) for IEC International Standards. CB test certificates are based on TRs.

Have a limited testing capability and carry out only specific and/or selected tests from a complete test programme required to issue a TR.

Are owned by manufacturers and participate in the IECEE System.

Are individuals, operating under the responsibility of NCBs, who carry out testing and/or supervisory activities locally at a CTF.