Events and Classes are not under any obligation to use a classification system but should they wish to do so the ISAF Code is the only system that shall be used.

Events organized for boats currently selected as equipment for an Olympic Sailing Competition shall not include any provision, whether in Class Rules, the Notice of Race or the Sailing Instructions preventing sailors from taking part, whatever their classification.

When the ISAF Sailor Classification Code is selected for an event it shall be stated in the Notice of Race unless already stated in the Class Rules.