Actually Ken, it won't be a problem here in Australia, and I notice that Peter shows his address as NSW, as long as it operates on an approved frequency. When I took up model boating some years ago, I used, and still use, my aircraft radios, which are 36 Mhz, one of the frequencies approved for RC models here. As you rightly say, if the radio offered to Peter is 2.4 Ghz, then there will be no problems with any frequency clash. Our model boat club operates a frequency board marked out for 27 and 29 Mhz AM, and 36 and 40 Mhz FM, although there a very few AM sets in use now. The popularity of 2.4 Ghz is increasing and, of course, this frequency does not require the use of a board.
Peter.