I know that Wayne. My DF65 was registered over 2 1/2 years ago. My query was whether it was in order to use a MYA Personal Number on a DF65. My IOM is registered number 4013, but sails under 66, which is my MYA Personal Number. I like to use the same number on as many of my boats as possible - Makes it easier to pick out your boat in a stressful moment! As it happens, it doesn't affect me, as my DF65 is registered no 266, so sails under 66. I just thought it would be good to get a definitive ruling.
David.