I wouldn't bother, because my preference is to tax capital gains on all property including family homes (and to apply this tax annually based on paper profits too).

That said, occupancy requirements are reasonably common elsewhere (e.g. to claim first home buyer benefits in AU, to prove that it's your primary residence to avoid capital gains taxes in AU, to get owner/occupier interest rates in AU) so I assume that they have some means of enforcement, but haven't really looked.