3. In article 2(1)—
(a)for the definition of “dwellinghouse” substitute—
““dwellinghouse”, except in Part 3 (changes of use), Part 12A (development by local authorities and health service bodies) and Part 20 (construction of new dwellinghouses) of Schedule 2 to this Order, does not include a building containing one or more flats, or a flat contained within such a building;”;
(b)in the definition of “flat” after “except” insert “in Part 20 (construction of new dwellinghouses) of Schedule 2 to this Order or”.