We do not know what you mean by "PFD", please do not use abbreviations. But the answer would be when the instructions for the "PFD" say it needs to be replaced.
In Iowa, inflatable personal flotation devices (PFDs) can be legally used for boating activities, but they must be worn at all times by individuals in certain situations. Specifically, inflatable PFDs are permitted for use by adults in boats over 16 feet in length, as long as they are approved by the U.S. Coast Guard. However, children under 13 years old must wear a traditional, non-inflatable PFD. It's essential to ensure that the inflatable PFD is properly maintained and has been fully inflated before use.
Inflatable PFD
Every time it is worn!
a pfd for everyone aboard
According to the manufacturers instructions.
A PFD for everyone aboard
a pfd for everyone aboard
a PFD for everyone aboard
Wearing an inflatable PFD while on a personal watercraft.
In Florida it is against the law to operate a PWC with a restricted use type V inflatable PFD.
Life Jacket or PFD for everyone on board