# Standards and References - Access Review and Certification

## NIST Standards
- **NIST SP 800-53 Rev 5**:
  - AC-2: Account Management (periodic review requirement)
  - AC-2(3): Disable accounts after inactivity period
  - AC-5: Separation of Duties
  - AC-6: Least Privilege
  - AC-6(7): Review of User Privileges
  - AU-6: Audit Record Review, Analysis, and Reporting
- **NIST SP 800-171**: 3.1.1 Authorized Access Control, 3.1.2 Transaction Control

## Compliance Requirements
- **SOX Section 404**: Quarterly access reviews for financial systems
- **PCI DSS 4.0**: Requirement 7.2.5 - Review all access at least every six months
- **HIPAA Security Rule**: 45 CFR 164.312(a)(1) - Access control review
- **ISO 27001**: A.9.2.5 Review of user access rights
- **GDPR Article 5(1)(f)**: Integrity and confidentiality of processing

## Industry Frameworks
- **CIS Controls v8**: Control 6.2 - Establish an Access Revoking Process
- **COBIT 2019**: DSS05.04 - Manage user identity and logical access
- **IGA Market**: SailPoint, Saviynt, One Identity, Omada
