According to the IIA's standards, a chief audit executive (CAE) can report that the internal audit activity conforms with the Standards if external assessments are performed at least once every five years and supported by ongoing internal assessments. In this scenario, the most recent external and internal assessments confirm conformance, which allows the CAE to report conformance with the Standards.References: The IIA's International Standards for the Professional Practice of Internal Auditing, particularly the standards related to quality assurance and improvement programs.