| LS | Title | From | To | Approval date |
| SG17-LS172 | LS on the lead study group concept and inter-study-group coordination (input to the discussion on TSAG-LS21) | SG17 | TSAG; SG21; SG13; SG20; | 2026-09-14 |
| TSAG-LS21 | LS on lead study group concept and coordination mechanisms | TSAG | SG2; SG3; SG5; SG21; SG11; SG12; SG13; SG15; SG17; SG20; | 2026-01-30 |