While reviewing a NOR for a forthcoming Regatta for multihulls I was drawn to the requirement placed in the NOR for PFDs to be worn at all times while on the water. There were also specific types of PFDs that were allowed. Since all my racing experience has been in monohulls I had questions for the members of the Race Committee regarding PFDs and anything unique to multihulls. Upon further review I discovered that these 16 ft., 18 ft. and 20 ft. cats don't sail with any throwable devices (Class IV PFDs). Since the Prescription to RRS 40 requires conformance to all government regulations regarding life-saving equipment how do the 16 foot plus multihulls race with no throwable? Are they considered two canoes or kayaks strapped together? (racing canoes and kayaks are exempt under CFR 175.15 (b). Can NORs or SIs handle the lack of throwable?