References in this Part to a "single-dwelling interest" are to be read in accordance with this section.
A chargeable interest that is exclusively in or over land consisting (on any day) of a single dwelling is a single-dwelling interest (on that day).
Where a person is entitled to a chargeable interest that is exclusively in or over land consisting (on any day) of two or more single dwellings—
Where a person is entitled to a chargeable interest in or over land that on any day consists of one or more single dwellings and non-residential land—
A single-dwelling interest is referred to as a single-dwelling interest "in" the dwelling concerned.
A single-dwelling interest in one dwelling is distinct from any single-dwelling interest in another dwelling, even if the dwellings stand successively on the same land.
In this section—