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