CC System ID
| CC_System_ID | Bit of cc_system_id_bitmask | Status |
| 1 | b0 | Allocated for the CI Plus LLP PKI as defined in CI Plus Specification 1.3 (CI Plus Root of Trust) |
| 2 | b1 | Allocated for the CI Plus LLP PKI as defined in CI Plus Specification 1.4 (CI Plus 2nd Root of Trust) |
| n/a | b7 | Reserved for a future extension mechanism for additional CC_System_IDs |