##### 7.1.2.11.1 Authority Key Identifier
| __Field__ | __Description__ |
| --- | ------- |
| `keyIdentifier` | MUST be present. MUST be identical to the `subjectKeyIdentifier` field of the Issuing CA. |
| `authorityCertIssuer` | MUST NOT be present |
| `authorityCertSerialNumber` | MUST NOT be present |