Text in force at CS29-12: from CS29-0, effective 14 Nov 2003.
(a) For m ain floats, the buoy ancy necessary to support the m aximum weight of the rotorcraft in fresh water must be exceeded by:
(1) 50%, for single floats; and
(2) 60%, for multiple floats.
(b) Each m ain float m ust have enough watertight compartments so that, with any single main float compartment flooded, the m ain floats will provide a margin of positive stability great enough to minimise the probability of capsizing.
ED Decision 2003/016/RM · Source