Yes. As per rule 26. of the INTERNATIONAL HOBIE CLASS ASSOCIATION 2013-2016 CLASS RULES all crew members on board a competing boat at Class world and regional* championships shall be members in good standing of the International Hobie Class Association in accordance with the constitution of the International Hobie Class Association. At all other events at least one crew member on board a competing boat shall be a member of the International Hobie Class Association in accordance with the constitution of the International Hobie Class Association unless prescribed otherwise in notice of race.
* Regional championships are defined as IHCA Regional Championships e.g. North American Championships, European Championships etc.