Development consent must not be granted to the erection of a dwelling house on land in Zone RU4 Primary Production Small Lots unless the area of the land--
(a) for land within "Area 1" identified on the Key Sites Map --is not less than 4,000 square metres, or
(b) for land within "Area 2" identified on the Key Sites Map --is not less than 10 hectares, or
(c) for land within "Area 3" identified on the Key Sites Map --is not less than 2 hectares.