The document provides guidance for bodies operating product certification systems on the application of ISO/IEC Guide 65:1996. It aims to enable accreditation bodies to harmonize their assessment of certification bodies and facilitate mutual recognition of accreditation. The guidance notes the terms that shall and should be used and covers topics like scope, definitions, organization of certification bodies, personnel qualifications, certification requirements and procedures, surveillance, use of licenses and marks, and complaints. It is intended to form the basis for mutual recognition agreements between accreditation bodies.