In this ultimate how to implement guide to ISO 27001 Annex A 5.5 Contact with Authorities, you will learn directly from an ISO 27001 Lead Auditor:
- The requirement of the control
- The required implementation steps
- The minimum requirement
I am Stuart Barker, the ISO 27001 Lead Auditor and author of the Ultimate ISO 27001 Toolkit.
Using over 30 years of industry experience across hundreds of audits, I’m giving you the exact templates, walkthroughs, and practical examples you need to achieve ISO 27001 certification.
Table of contents
- ISO 27001 Contact with Authorities Implementation Checklist
- 1. Identify Your Legal and Regulatory Bodies
- 2. Identify Specialist Law Enforcement Contacts
- 3. Identify Critical Infrastructure Providers
- 4. Identify Emergency Services
- 5. Create a Centralised Contact Register
- 6. Define Specific Notification Triggers
- 7. Assign Authority-Specific Roles
- 8. Secure an Offline Copy of the Register
- 9. Verify Contact Details via Direct Testing
- 10. Schedule Bi-Annual Maintenance Reviews
Implementing ISO 27001 Annex A 5.5 (Contact with Authorities) is a mandatory information security control that requires organisations to establish and maintain a validated register of relevant legal, regulatory, and specialist emergency contacts. This Primary Implementation Requirement ensures rapid, authorised communication during cyber incidents, delivering the Business Benefit of minimised regulatory penalties, operational continuity, and effective crisis management.
ISO 27001 Contact with Authorities Implementation Checklist
Use this implementation checklist to achieve compliance with ISO 27001 Annex A 5.5. This guide prioritises practical, operational readiness over theoretical documentation, ensuring you can effectively communicate with regulators and emergency services during a crisis.
1. Identify Your Legal and Regulatory Bodies
Control Requirement: The organisation must identify relevant legal, statutory, regulatory, and contractual authorities.
Required Implementation Step: Create a list of specific regulators for your sector (e.g., ICO for data, FCA for finance) including their mandatory reporting deadlines (e.g., 72 hours).
Minimum Requirement: You must list at least your primary data protection regulator (e.g., the ICO in the UK) with their breach reporting URL.
2. Identify Specialist Law Enforcement Contacts
Control Requirement: The organisation must maintain contact with law enforcement authorities.
Required Implementation Step: Research and document the direct phone number or reporting portal for your regional Cyber Crime Unit or Fraud Squad.
Minimum Requirement: Do not just list “999” or “911”. You must have the non-emergency contact for reporting cyber incidents.
3. Identify Critical Infrastructure Providers
Control Requirement: The organisation must maintain contact with utility and service providers relevant to information security.
Required Implementation Step: Document emergency support numbers for your ISP, electricity provider, and primary cloud host (e.g., AWS/Azure critical support line).
Minimum Requirement: A support ticket URL for your internet service provider and the emergency outage number for your office power grid.
