ISO/IEC 27009:2020

This document specifies the requirements for creating sector-specific standards that extend ISO/IEC 27001, and complement or amend ISO/IEC 27002 to support a specific sector (domain, application area or market).
This document explains how to:
-  include requirements in addition to those in ISO/IEC 27001,
-  refine or interpret any of the ISO/IEC 27001 requirements,
-   include controls in addition to those of ISO/IEC 27001:2013, Annex A and ISO/IEC 27002,
-  modify any of the controls of ISO/IEC 27001:2013, Annex A and ISO/IEC 27002,
-  add guidance to or modify the guidance of ISO/IEC 27002.
This document specifies that additional or refined requirements do not invalidate the requirements in ISO/IEC 27001.
This document is applicable to those involved in producing sector-specific standards.