| LS | Title | From | To | Approval date |
| SG15-LS131 | LS/r on lead study group concept and coordination mechanisms (reply to TSAG-LS21) | SG15 | TSAG; | 2026-07-10 |
| 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 |