The IIA Three Lines Model for AI: Risk Ownership, Independent Assurance, and Evidence Reliance
Under the IIA Three Lines Model, management owns AI risk, specialist second-line roles support and challenge risk management, and internal audit independently assesses governance and controls. A later reviewer may rely on previous AI assessment work only to the extent that its original claim, scope, evidence, dependencies, provider safeguards, and current use justify the new conclusion. CEDAR-3L is a proposed InfoSecured.ai method for recording that decision.









