What major change occurred in E6(R2) on 9 November 2016?

• A. Adoption by the Regulatory Members of the ICH Assembly under Step 4, integrating changes into the original guideline.
• B. Publication of a new ICH guideline separate from E6.
• C. Withdrawal of E6 from ICH guidelines.
• D. Adoption by the ICH Steering Committee under Step 3.

Answer: (A)

The main idea is understanding how ICH guidelines are updated and when changes become official. On 9 November 2016, the revision to E6 was adopted by the Regulatory Members of the ICH Assembly at Step 4, which means the changes were formally approved and integrated into the existing E6 guideline. This marks the official adoption and implementation across ICH regions, rather than the creation of a separate new guideline, a withdrawal, or adoption at an earlier step.