In this Part of this Act—
" heritable security " means a heritable security within the meaning of section 9(8)(a) of the [1970 c. 35.] Conveyancing and Feudal Reform (Scotland) Act 1970;
" highway ", in relation to Scotland, includes a public right of way;
" land " includes any estate or interest in or right over land;
" self-build society " means a housing association whose object is to provide, for sale to, or occupation by, its members, dwellings built or improved principally with the use of its members' own labour and " unregistered self-build society " means a self-build society which is not a registered housing association ;
" subsidiary " has the same meaning as in the [1948 c. 38.] Companies Act 1948; and
" the 1964 Act " means the [1964 c. 56.] Housing Act 1964.