Well Larry , I enquired on the maxrpm website and Rob Tate says that he asked Billy Nutt and that that was where the answer came from . I think Ive still got his reply stored away somewhere , if so Ill e-mail it to you .I was speaking to Bill Swallows mate , Trevor White about this and he said that if Bill rides a classic bike in Ireland ( I dont know whether he meant North or South)he is allowed to use his open face helmet , but if he rides the 400 honda which he does occasionally, then he has to use a full face helmet ! Yes , I know , It dont make sense to me either.