Here's another case. I have a friend who (genuinely) cruises virtually all year, but has retained his EOG farm mooring for when he needs medical treatment. So as long as he's not there for more than a couple of weeks at a time, which he isn't, although he has a contract for a permanent home mooring, my assumption is that he can declare as CC, saving himself about a grand, as it's no business of CRTs what the farmer does with the mooring, which, obviously, is usually vacant.
Its a sort of reversal of the ghost mooring theory... the advantage now goes the other way.