GDPR Article 55 — Competence

What this control requires

This control ensures that each supervisory authority is competent to perform tasks and exercise powers within its Member State, with specific exceptions for courts acting in their judicial capacity and certain processing activities by public authorities or private bodies. This control addresses Supervisory Authorities.

In plain English

This control ensures that each supervisory authority is competent to perform tasks and exercise powers within its Member State, with specific exceptions for courts acting in their judicial capacity and certain processing activities by public authorities or private bodies. In practice, this means you can prove you tasks supervisory authority-level controls on a defined cadence.

Why it matters

GDPR administrative fines reach the greater of €20 million or 4% of global annual turnover. The European Data Protection Board (EDPB) coordinates supervisory-authority enforcement across the EU/EEA, and DPAs publish enforcement decisions citing specific Articles.

What an auditor looks for

A DPA or privacy auditor expects: a Records of Processing Activities (RoPA) entry, a documented lawful basis, evidence the Article's data-subject right is operationalised end-to-end, a named DPO contact (where required), and Article 30 records that match what the front-end actually does.

Within Chapter VI: Supervisory Authorities, the assessor will trace your implementation back to the catalogue reference (Article Article 55) and look for objective evidence on the latest two assessment cycles.

How to implement

Policy Management

Docs. Keep each policy in version-controlled Markdown alongside the code that implements it; ship a signed PDF snapshot at each annual review and link the SHA into the SoA.

Operational checklist

• Tasks. Document the trigger, the owner and the cadence.
• Supervisory. Document the trigger, the owner and the cadence.
• Competence. Document the trigger, the owner and the cadence.
• Powers. Document the trigger, the owner and the cadence.
• Exercise. Document the trigger, the owner and the cadence.
• Scope: supervisory authority.

Evidence to collect

• Policy Document. A signed and version-controlled policy / standard / procedure document.

Signed policy or standard documents the safeguard. Focus: Competence.

Common pitfalls

• Policies that no engineer has read; the version in Confluence drifts from the version that's actually being enforced.

How it maps to other frameworks

Computed from shared tags, control component and key-operation subjects — handy when you are reconciling controls across an audit.

• ISO/IEC 27001:2022 A.8.6 — Capacity management
• SOC 2 (2017 TSC) A1.1 — Monitoring and Managing System Capacity
• CIS Controls v8 2.6 — Allowlist Authorized Libraries

Related controls in GDPR

• Article Article 53 — General conditions for the members of the supervisory authority
• Article Article 54 — Rules on the establishment of the supervisory authority
• Article Article 51 — Supervisory authority
• Article Article 56 — Competence of the lead supervisory authority
• Article Article 78 — Right to an effective judicial remedy against a supervisory authority
• Article Article 91 — Existing data protection rules of churches and religious associations

References

• European Union — GDPR
• Catalogue identifier: Article Article 55

Topics: governance riskcapacity managementpolicy management