4.—(1) This article applies to dwellinghouses situated in the areas designated as an area of outstanding natural beauty for the purposes of the National Parks and Access to the Countryside Act 1949 by the Wye Valley Area of Outstanding Natural Beauty (Designation) (Wales) Order 1971.
(2) In relation to a dwellinghouse to which this article applies, the designated region for the purposes of section 157(3) of the 1985 Act shall be the area comprising the following:
(a)the area designated by that order, and
(b)so much of the county in which the dwellinghouse is situated as is not within the area designated by that order.