IRC racing in South East Asia is well established, with popular regattas including Singapore Straits, Raja Muda and Phuket King's Cup attracting large and competitive fleets from around the region and further afield. There is a great deal of interchange between the IRC fleets, particularly in Singapore, Malaysia and Thailand, with many boats regularly travelling to regattas in other countries.

Question:

Is it permissible under IRC to race with a spinnaker set reefed?