Explanation
The reference for you to know who should have access to data/document is the Access Control List (ACL), which is a list of users or groups who are authorized to access a specific data/document and their respective access rights (such as read, write, modify, delete, etc.). The ACL is a tool for implementing the access control policy of the organization, which is defined in accordance with ISO/IEC 27001:2022 clause 9.4.1. The ACL should be maintained and updated regularly to ensure that only authorized users can access the data/document. References: [CQI & IRCA Certified ISO/IEC 27001:2022 Lead Auditor Training Course],
[ISO/IEC 27001:2022 Information technology - Security techniques - Information security management systems - Requirements]