# Access Control Policy

## Principles

### Least Privilege
- Users granted minimum permissions necessary
- Permissions reviewed regularly
- Temporary elevated access logged and time-limited

### Separation of Duties
- Critical operations require multiple approvals
- No single user has complete control over sensitive processes
- Regular rotation of critical roles

### Need-to-Know
- Access granted only when job function requires it
- Regular recertification of access rights
- Immediate revocation when no longer needed

## Access Levels

### Level 1: Read-Only
- View non-sensitive data
- No modification capabilities
- Basic reporting access

### Level 2: Standard User
- Read and write within assigned scope
- Cannot delete or modify security settings
- Limited administrative functions

### Level 3: Power User
- Extended permissions within domain
- Can manage team resources
- Subject to enhanced monitoring

### Level 4: Administrator
- Full system access
- Can modify security configurations
- Requires MFA and enhanced logging
- Regular security training mandatory

## Authentication Requirements

| Access Level | Password | MFA | Session Timeout | IP Restriction |
|--------------|----------|-----|-----------------|----------------|
| Read-Only | Standard | Optional | 8 hours | No |
| Standard User | Strong | Recommended | 4 hours | Optional |
| Power User | Strong | Required | 2 hours | Recommended |
| Administrator | Very Strong | Required | 1 hour | Required |

## Access Review Process
- Quarterly review of all access permissions
- Automated alerts for dormant accounts (90+ days)
- Immediate revocation upon role change or termination
- Annual access recertification for all users