ISO 17021 Control of Documented Information

Even though the CB is not ISO 9001 certified, are there any similar requirements under ISO 17021:2015 or any other standard that CBs should comply with?

Answer:

Standard ISO IEC 17021-1 Conformity assessment -- Requirements for bodies providing audit and certification of management systems -- Part 1: Requirements defines requirements for document and record control for certification bodies. These requirements look more like ISO 9001:2008 requirements for document and record control than the requirements of ISO 9001:2015. Requirements of clause 7.5.2 a) form ISO 9001:2015 have analogue requirements in clause 10.2.3 e) of ISO 17021-1 that says that documents should be "legible and readily identifi able", and this practically means that the same requirements for identification of documents exist in both ISO 9001 and ISO 17021-1.