The official web site of the WC 2015 is now www.aclassworlds2015.it
The championship is OPEN, it means there are no limit about numbers of entries, and in case of more than 120 boats, the fleet will be split into two different.
NOR Link http://acatworld2015.it/notice-of-race.html
That's the reason of the NOR point 4, because the organization must to know the number of boats in advance.
4. ENTRY FEES
Competitor registration fee is 200Euros (A 50Euros penalty will apply for late registration as of May 1 st ). No entries will be accepted later than June 30th; ; later entries will only be accepted in case the number of 120 boats is not reached and in any case only up to 120 competitors (An additional 80Euros penalty will apply .
President A Cat Italy