PART 4 - OTHER REQUIREMENTS WHEN RACING
Part 4 rules apply only to boats racing, unless the rule states otherwise.
40 PERSONAL FLOTATION DEVICES
40.1 Basic Rule
When rule 40.1 is made applicable by rule 40.2, each competitor shall wear a personal flotation device except briefly while changing or adjusting clothing or personal equipment. Wet suits and dry suits are not personal flotation devices.
40.2 When Rule 40.1 Applies
Rule 40.1 applies
(a) if flag Y was displayed afloat with one sound before or with the warning signal, while racing in that race; or
(b) if flag Y was displayed ashore with one sound, at all times while afloat that day.
However, rule 40.1 applies when so stated in the notice of race or sailing instructions.