From the AIAG website:
"Rules for ISO/TS 16949 Certification Scheme
Automotive Certification Scheme for ISO/TS 16949, Rules for Achieving and Maintaining IATF Recognition, Fourth Edition.
This document, in regards to ISO/TS 16949 implementation, includes criteria for certification body recognition, certification body audit process, certification body auditor qualifications, and ISO/TS 16949 certificates. These requirements and any Annexes are binding for certification bodies recognized by the IATF for the ISO/TS 16949 certification scheme and, therefore, shall need to be understood by any client seeking ISO/TS 16949 certification."
From SMMT website:
"The purpose for the new edition
Support the on-going development of the value and credibility of the ISO/TS 3rd party certification scheme.
Provide clarification of requirements based on issues found during office assessment and witness audit
Need to incorporate the existing 16 FAQ?s and 22 SI?s issued against Rules for Achieving Recognition 3rd edition"