Three lines model
A governance framework in which the first line (operations/business) owns and manages risk, the second line (compliance/risk) provides oversight and monitoring, and the third line (internal audit) provides independent assurance; the AI compliance function most commonly sits in the second line for deployer organizations.
Defined in 3 GAGE programs, which carry 3 distinct definitions of it. The wording above is taught in EU AI Act Implementation Expert.
How each discipline defines it
The same term does different work depending on who is using it. These are the definitions as each program teaches them, unedited.
A governance framework in which the first line (operations/business) owns and manages risk, the second line (compliance/risk) provides oversight and monitoring, and the third line (internal audit) provides independent assurance; the AI compliance function most commonly sits in the second line for deployer organizations.
The Institute of Internal Auditors' July 2020 update to its earlier Three Lines of Defense framework, renamed to emphasize supporting sound decision-making alongside defensive risk management, while preserving the same structural separation between owning, validating, and auditing a risk.
The structure (first line: business units; second line: risk and compliance; third line: internal audit) that management runs to produce and assure AI risk information, which the board receives but does not operate.
Where it is taught
The exact lessons this term appears in. The first module of every program is free with a free account.
- Board-Level AI Governance · Bonus: AI Leadership Accelerator, Certified AI Practitioner: Workplace Foundations
- Independent Challenge: The Second Line Reads the Model · Evaluation and Trust, Certified AI Governance Professional (CAIGP)
- Organizational Positioning: Legal, Compliance, IT, or Operations? · The EU AI Act Expert Role, EU AI Act Implementation Expert
Where it shows up at work
A definition is where Three lines model starts. The lessons above teach it inside the competencies below, which are what job descriptions ask for and what the GAGE credential records. Every link here is drawn from the same careers map that builds a role's readiness check.
Designs decision rights, committees, intake, approval tiers and escalation so routine uses move and consequential uses get reviewed.
One lesson on this page teach it as a primary outcome.
Turns technical uncertainty into a one-page decision: material risks, trends, exceptions, remediation, and what the board is being asked to accept.
One lesson on this page teach it as a primary outcome.
Defines who reviews AI outputs, what they check, when they can override, and how to keep review from becoming a rubber stamp.
One lesson on this page teach it as a primary outcome.
Roles that hire for it
Each role page shows the full competency set, what the seat decides, and a readiness check against your own evidence.
- VP of AI Governance and Ethicsneeds it at depth
- Chief AI Officerneeds it at depth
- Chief Compliance Officer, AI compliance editionneeds it at depth
- AI Governance Managerneeds it at depth
- Chief Risk Officer, AI risk editionneeds it at depth
- Autonomous Systems Governance Lead, robotics and physical AI editionneeds it at depth
How job descriptions say it
Postings rarely use the textbook word. These are the phrases the careers map reads as asking for the competencies above.
Where the frameworks place it: NIST AI RMF GOVERN; ISO/IEC 42001 Clause 5; EU AI Act Article 14; ISO/IEC 42001 Annex A.
One interview question about it
Sketch the governance operating model you would set up for a company deploying its first customer-facing AI. Who decides, who reviews, and who can stop it?
Asked of candidates for ai governance operating model design. Answering it in your own words is exactly how a GAGE topic is passed, and the credential records the pass where an employer can check it.
If you come from another field
Some backgrounds already carry this competency, and the readiness check gives credit for it.
- Internal audit and IT audit carries it as a claim to back up: Audit committee reporting is part of senior audit roles.
- Nonprofit program and grants oversight carries it as a claim to back up: Board and funder reporting is the cadence a governance committee needs.
- A business, MBA or technology management degree carries it as work you can show: Executive briefs and presentations are your assignments.
Terms it appears with
Not an alphabetical neighbourhood: these are the terms taught in the same lessons, ranked by how often they appear together.