CM-12 asks a question every customer eventually asks. Where does our data actually live? The statement has three duties. Identify and document the location of the information you define and the system components that process and store it. Identify and document the users with access to those components. Document changes to the location.
800-53 binds US federal systems and, by contract, others. It is a reference for the rest, and data location questions come up in privacy reviews and data residency clauses.
What it means in practice
The guidance says information location is about knowing where specific information types sit in system components and how they are processed, so you can follow the information flow and apply the right protection. It also ties the security category of the information to the controls the host component needs, and notes that location shapes system architecture.
In plain terms you need a living map from data type to storage and processing components, with an access list and a change log.
Evidence to collect
- A data inventory listing data types, their classification and the components that hold them.
- Architecture or data flow diagrams marked with where regulated data sits.
- Access lists for those components, from your identity provider or cloud console.
- A change record for moves, such as migrating a database to a new region.
Common gaps
- Copies in logs, analytics, backups and support tools are missing from the map.
- The map lists systems but not the people with access.
- A region change happened and nobody updated the record.
- Shadow exports sit in personal drives.
How to implement it
Begin with your most sensitive data type and trace every place it lands. Add the access list next to each location. Make the map part of the change process so a move triggers an update. CM-12.1, Automated Tools to Support Information Location, covers discovery tooling.
Quick check
What three things does CM-12 want documented?
Where the information and its components are, who has access to them, and any changes to that location.
