| LS | Title | From | To | Approval date |
| SG15-LS127 | LS/r on continuation of the valuable collaboration (reply to ITU-D Q1/1-Document 1/99(Rev.1)) | SG15 | ITU-D Q1/1; | 2026-07-10 |
| ITU-D Q1/1-Document 1/99(Rev.1) | LS on continuation of the valuable collaboration | ITU-D Q1/1 | ITU-R WP 5A; ITU-R WP 5D; JCA-IMT2020/IMT2030; SG13; SG15; SG2; SG3; SG5; SG21; SG11; | 2026-04-22 |