This standard specifies requirements on the competence of providers of interlaboratory tests in the field of immission control. It details the requirements of DIN EN ISO/IEC 17043. The requirements apply to providers of interlaboratory tests used for the demonstration of competence and performance of bodies for an accreditation and a notification as well as for the associated quality checks or for the validation and verification of measurement methods. In accreditation procedures this standard forms the basis together with DIN EN ISO/IEC 17043 for the demonstration of the competence of providers of interlaboratory tests in the field of immission control. This standard applies to providers of interlaboratory tests, to accreditation bodies, to testing laboratories and competent authorities in the field of immission control.