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ISO/IEC 27001 requires the organization to assign relevant ISMS responsibilities and authorities, but it does not require a role with the exact title 'Annex A control owner' or one owner for every Annex A row. The organization determines the controls necessary for risk treatment; some may come from outside Annex A.

A named control owner is still useful. Define that person's authority and duties, such as coordinating implementation, confirming operating evidence, reporting failures, and proposing changes. The risk owner remains responsible for approving the treatment plan and accepting residual information security risk.

ISO/IEC 27001 does not mandate a control-owner register or a fixed set of fields. Use the Statement of Applicability, a control register, or another controlled record that lets people find the current responsibility and evidence without creating conflicting sources of truth.

For each necessary control, connect the owner to the control's purpose, scope, implementation status, operating process, evidence, dependencies, open issues, and relevant risk-treatment records. If several teams operate the control, name the accountable owner and each operational handoff.

ISO/IEC 27001 does not require two approvers or prescribe who approves a control-owner change. Define approval authority in the organization's ISMS roles and change process, proportionate to the control's scope and risk.

A routine personnel change may need only the process owner to update the record. A transfer that changes control design, treatment, scope, a supplier dependency, or residual risk also needs the relevant risk and governance decisions updated.

Review ownership at the organization's planned interval and when a change affects the assignment or control. ISO/IEC 27001 does not set a universal review frequency for control-owner records.

Useful triggers include reorganizations, role departures, scope or architecture changes, supplier transitions, control failures, audit findings, incidents, and changes to risk treatment. Preserve enough history to show when each assignment applied.

Start with evidence that ISO/IEC 27001 itself requires the organization to retain or make available: the ISMS scope, risk-assessment and treatment process and results, information security objectives, operational records needed for confidence, monitoring and measurement results, internal-audit programme and results, management-review results, and nonconformity and corrective-action records.

Then add operating evidence for the necessary controls identified in the Statement of Applicability. The audit is based on sampling, so an evidence index improves retrieval but does not replace underlying records or guarantee certification.

Design evidence explains how the ISMS is meant to work: policy, scope, roles, criteria, procedures, SoA rationales, treatment plans, and control designs. Operating evidence shows that those arrangements actually ran during the relevant period and that results were evaluated.

A policy can support a design claim but does not prove that an access review occurred, a recovery test succeeded, a supplier was reviewed, or a corrective action was effective. Match the evidence to the claim and audited period. Protect secrets and personal data by agreeing secure access, live demonstration, or proportionate redaction with the certification body rather than withholding evidence without explanation. The auditor still needs enough verifiable information to reach a conclusion.

The organization owns its ISMS and evidence. Process owners, control owners, risk owners, internal auditors, and top management each retain their ISO/IEC 27001 responsibilities; an external auditor should not be written into those operating roles.

The certification body audits the ISMS and makes the certification decision under the applicable scheme. ISO/IEC 27006-1:2024 adds ISMS-specific requirements for bodies that audit and certify against ISO/IEC 27001 and complements ISO/IEC 17021-1. Accreditation is a separate assessment of the certification body's competence for the relevant activity and scope.

Update evidence through normal ISMS operation, not only before an external audit. Planned monitoring, risk reassessment, internal audit, management review, and corrective action continuously create or change the records on which certification relies.

Significant changes to scope, products, services, locations, suppliers, technology, risks, controls, or legal and contractual requirements should trigger review of the linked risk treatment, SoA, operating evidence, and certification-body notification obligations. The exact external notification and audit process comes from the certification arrangement, not from this checklist.

Build an audit programme that states frequency, methods, responsibilities, planning requirements, and reporting. Consider the importance of each process and previous audit results rather than defaulting to equal annual coverage.

For each audit, define the audit criteria and scope before testing. Collect objective evidence through records, observation, interviews, demonstrations, and samples; report the results to relevant management; then handle confirmed nonconformities through the corrective-action process.

Retain evidence that the audit programme was implemented and the audit results. A usable audit file identifies the criteria and scope, auditor, dates, methods, samples, evidence examined, conclusions, and reported findings.

A finding should distinguish a nonconformity from an observation or improvement suggestion. ISO/IEC 27001 requires action on nonconformities; labels such as observation or opportunity for improvement come from the organization's audit method and should not be used to weaken a failure to meet a requirement. For a nonconformity, link the unmet requirement and evidence to correction, cause analysis, corrective action, and the later effectiveness review required by Clause 10.2.

The auditor forms and reports the audit conclusion; relevant management receives the results. The process owner normally owns correction and corrective action, while someone able to make an objective judgment verifies completion and effectiveness under the organization's procedure.

Do not close a nonconformity because a due date passed or a document was uploaded. Confirm the immediate correction, assess the cause and whether the issue could exist elsewhere, implement any needed corrective action, and review its effectiveness. For example, correcting one missing approval fixes the sampled record; changing the workflow and then testing later approvals may address and verify the systemic cause.

ISO/IEC 27001 requires internal audits at planned intervals but sets no universal annual frequency. Set the programme so the organization can judge conformity and effective implementation across the ISMS, using process importance and previous results to decide timing and coverage.

A major change, incident, repeated failure, overdue corrective action, or new risk may justify an additional or earlier audit. That is a risk-based programme decision, not a separate fixed timetable imposed by the standard.

Clause 9.3 requires top management to review the ISMS at planned intervals for continuing suitability, adequacy, and effectiveness. It is a leadership review of the management system, not a security-team status meeting delegated without management participation.

The management review inputs must cover previous-review actions; relevant changes in internal and external issues and interested-party needs; performance trends for nonconformities and corrective actions, monitoring and measurement, audit results, and objective fulfilment; interested-party feedback; risk-assessment results; risk-treatment-plan status; and continual-improvement opportunities.

The management review results must include decisions on continual-improvement opportunities and any needed ISMS changes under Clause 9.3.3. The standard requires evidence of the results, not a particular meeting format or document called 'minutes.'

Retain controlled documented information showing what top management reviewed and decided. Date, participants, scope, inputs, decisions, actions, owners, target dates, and links to affected risk, treatment, objective, corrective-action, or change records make that evidence usable.

Top management owns the review. ISMS, risk, audit, privacy, technology, legal, supplier, or service teams can prepare inputs and own resulting actions, but their attendance does not replace top management's responsibility to review the system.

Assign each resulting action to someone with authority and resources to complete it. Risk owners still approve the risk-treatment plan and accept residual information security risk under Clause 6.1.3; management review should not silently overwrite those accountable decisions.