In the common IEC standard, some electrical products, one or more samples have been used in accordance with a standard IECEE tested and proved that the samples meet the standard. CB test certificate only with the relevant test reports, to be effective. Test report should include the relevant standards, test results, and, if required, should also include declared national differences of the test results of the mutual recognition of certification units are issued by CB report to each other, and accordingly issued when the State or the safety certification of the certificate or proof.