According to IIA guidance, the primary reason the chief audit executive discusses the internal audit charter with senior management and the board is to provide an understanding of the Mission of Internal Audit and The IIA's mandatory guidance elements. The charter defines the purpose, authority, and responsibility of the internal audit activity, aligning it with the organization's objectives and governance.References: The IIA's International Professional Practices Framework (IPPF) particularly emphasizes the importance of the internal audit charter as a foundational document.