Current stage: 20.99 Effective date: Aug 21, 2026
Next stage: CD Next stage date: Dec 31, 2027
Originator: IEC
Owner: TC 62
Type: International Standard
ICS: 11.040.01 35.240.80
IN_DEVELOPMENT IEC 63767 ED1 20.99 WD approved for registration as CD Aug 21, 2026