| LS | Title | From | To | Approval date |
| SG17-LS62 | LS/r on lead study group concept (reply to TSAG-LS4) | SG17 | TSAG; | 2025-12-11 |
| SG5-LS45 | LS/r on lead study group concept (reply to TSAG-LS4) | SG5 | TSAG; | 2025-11-06 |
| SG15-LS81 | LS/r to TSAG on lead study group concept (reply to TSAG-LS4) | SG15 | TSAG; | 2025-10-24 |
| SG2-LS72 | LS/r on lead study group concept (reply to TSAG-LS4) | SG2 | TSAG; | 2025-10-23 |
| SG21-LS156 | LS/r on lead study group concept (TSAG-LS4) | SG21 | TSAG; | 2025-10-17 |
| SG20-LS109 | LS/r on lead study group concept (reply to TSAG-LS4) | SG20 | TSAG; | 2025-09-25 |
| TSAG-LS4 | LS on lead study group concept | TSAG | SG2; SG3; SG5; SG21; SG11; SG12; SG13; SG15; SG17; SG20; | 2025-05-30 |