Which of the following indicates an appropriate disclosure of a potential nonconformance with the Standards?

An appropriate disclosure of potential nonconformance with the Standards would be that an external assessment of the internal audit activity was last performed six years ago. According to IIA standards, external assessments must be conducted at least once every five years. Failing to perform an external assessment within this timeframe constitutes nonconformance with the Standards.

IIA Standard 1312 - External Assessments, which requires that external quality assessments be performed at least once every five years to ensure conformity with the Standards.