| LS | Title | From | To | Approval date |
| SG20-LS105 | LS on initiation of draft new Supplement ITU-T Y.Sup-GDDE “Supplement to ITU-T Y.4221 - Use cases and requirements for gateway device in distribution of electricity” | SG20 | IEC TC 57; ISO/IEC JTC1/SC41; | 2025-09-25 |