World Sailing has approved one of the submissions of the January 2025 EGM regarding the maximum line length:
C.9.5:
The maximum distance measured from the lowermost point of the rigging to the connection between speedsystem/mixer and bridles shall be 16000 mm.
The maximum distance measured from the lowermost point of the rigging to the bridle attachment points on the kite shall be 25000 mm.
The updated class rules can be found here: Link to World Sailing website
