The best step for the chief audit executive (CAE) to take when determining that the internal audit activity lacks adequate independence is to request that the board restructure the reporting line to ensure the CAE has unrestricted access to the board. This action will help to enhance the independence and objectivity of the internal audit activity by ensuring that the CAE reports functionally to the board, which is a key aspect of maintaining organizational independence.

The IIA Standards: Standard 1110 – Organizational Independence: "The chief audit executive must report to a level within the organization that allows the internal audit activity to fulfill its responsibilities. The chief audit executive must confirm to the board, at least annually, the organizational independence of the internal audit activity."

IIA Practice Guide: "Independence and Objectivity": Discusses the importance of reporting lines and organizational structure in maintaining the independence of the internal audit activity.