Regulations may provide that, for the purposes of this Part as it applies in relation to an unoccupied hereditament, the state of any property comprising or included in the hereditament shall be deemed not to have changed—
The regulations may make provision as to the circumstances in which, and period for which, that is deemed to be the case.
The regulations may provide for the making of such assumptions or apportionments as may be prescribed in determining whether, or to what extent, the state of any property has changed in comparison with an earlier point in time.
The regulations may—
The regulations may provide that they have effect (with any necessary adaptations) in relation to omissions as well as to acts.
Regulations under this section may be made by the appropriate national authority.