Who is not required to wear a us coast guard-approved pfd while engaged in the activity indicated?

Everyone on board a PWC must wear a USCG-approved Type I, II, III, or V PFD. Children under 7 years of age must wear a USCG-approved Type I, II, III, or V PFD at all times while on board any vessel, unless the child is confined in a totally enclosed area of the vessel such as the cabin area of a houseboat or day-cruiser.