Subject to paragraphs (2) and (3), where a dwelling falls within the area of two or more billing authorities, the dwelling shall be treated for the purposes of Part I of the Act as situated in the area in which the greater or greatest part of the dwelling, determined in accordance with regulation 5, is situated.

Subject to paragraph (3), where a dwelling is part of a single property which falls within the area of two or more billing authorities, it shall be treated for the purposes of Part I of the Act as situated in the area in which the greater or greatest part of that property, determined in accordance with regulation 5, is situated.

Where a dwelling is a composite hereditament or is part of a single property which is a composite hereditament, each such dwelling shall be treated, for the purposes of Part I of the Act, as situated in the area in which the composite hereditament is treated as situated, for the purposes of Part III of the 1988 Act.