ISO/IEC 17021-1 contains principles and requirements for the competence, consistency and impartiality of bodies providing audit and certification of all types of management systems.
Certification bodies operating to ISO/IEC 17021-1 do not need to offer all types of management system certification.

This International Standard contains requirements for the competence, consistent operation and impartiality of product, process and service certification bodies. Certification bodies operating to this International Standard need not offer all types of products, processes and services certification.

ISO/IEC 17024:2012 contains principles and requirements for a body certifying persons against specific requirements, and includes the development and maintenance of a certification scheme for persons.

ISO/TS 22003:2013 defines the rules applicable for the audit and certification of a food safety management system (FSMS) complying with the requirements given in ISO 22000 (or other sets of specified FSMS requirements). It also provides the necessary information and confidence to customers about the way certification of their suppliers has been granted.