3.—(1) A person discriminates against another in any circumstances relevant for the purposes of any provision of this Order if—
(a)on racial grounds he treats that other less favourably than he treats or would treat other persons; or
(b)he applies to that other a requirement or condition which he applies or would apply equally to persons not of the same racial group as that other but—
(i)which is such that the proportion of persons of the same racial group as that other who can comply with it is considerably smaller than the proportion of persons not of that racial group who can comply with it; and
(ii)which he cannot show to be justifiable irrespective of the colour, race, nationality or ethnic or national origins of the person to whom it is applied; and
(iii)which is to the detriment of that other because he cannot comply with it.
(2) For the purposes of this Order segregating a person from other persons on racial grounds is treating him less favourably than they are treated.
(3) A comparison of the case of a person of a particular racial group with that of a person not of that group under paragraph (1) must be such that the relevant circumstances in the one case are the same, or not materially different, in the other.