Nothing in Parts II to IV shall render unlawful any act done in relation to particular work by any person in or in connection with—
(a) affording only persons of a particular racial group access to facilities for training which would help to fit them for that work; or
(b) encouraging only persons of a particular racial group to take advantage of opportunities for doing that work,
where it reasonably appears to that person that at any time within the twelve months immediately preceding the doing of the act—
Where in relation to particular work it reasonably appears to any person that although the condition for the operation of subsection (1) is not met for the whole of Great Britain it is met for an area within Great Britain, nothing in Parts II to IV shall render unlawful any act done by that person in or in connection with—
(a) affording persons who are of the racial group in question, and who appear likely to take up that work in that area, access to facilities for training which would help to fit them for that work; or
(b) encouraging persons of that group to take advantage of opportunities in the area for doing that work.
The preceding provisions of this section shall not apply to any discrimination which is rendered unlawful by section 4(1) or (2).