| LS | Title | From | To | Approval date |
| OIF-LS52 | LS on 400ZR IA Maintenance Project Update | OIF | SG15; | 2022-02-16 |
| SG15-LS346 | LS/r on 400ZR IA Maintenance project (reply to OIF-47) | SG15 | OIF; | 2021-12-17 |
| OIF-LS47 | LS on 400ZR IA Maintenance project update | OIF | SG15; | 2021-11-09 |