| Confidential | Indicates authorization to view information classified at or below the level of 'confidential', as established by Executive Order 12968. |
| Secret | Indicates authorization to view information classified at or below the level of 'secret', as established by Executive Order 12968. |
| Top Secret | Indicates authorization to view information classified at or below the level of 'top secret', as established by Executive Order 12968. |
| None | Indicates that no authorization exists to view classified information. |